jaeger-client -> opentelemetry

13 files changed, 1637 insertions, 0 deletions

diff --git a/vendor/psr/http-message/CHANGELOG.md b/vendor/psr/http-message/CHANGELOG.md
new file mode 100644
index 000000000..74b1ef923
--- /dev/null
+++ b/vendor/psr/http-message/CHANGELOG.md
@@ -0,0 +1,36 @@
+# Changelog
+
+All notable changes to this project will be documented in this file, in reverse chronological order by release.
+
+## 1.0.1 - 2016-08-06
+
+### Added
+
+- Nothing.
+
+### Deprecated
+
+- Nothing.
+
+### Removed
+
+- Nothing.
+
+### Fixed
+
+- Updated all `@return self` annotation references in interfaces to use
+  `@return static`, which more closelly follows the semantics of the
+  specification.
+- Updated the `MessageInterface::getHeaders()` return annotation to use the
+  value `string[][]`, indicating the format is a nested array of strings.
+- Updated the `@link` annotation for `RequestInterface::withRequestTarget()`
+  to point to the correct section of RFC 7230.
+- Updated the `ServerRequestInterface::withUploadedFiles()` parameter annotation
+  to add the parameter name (`$uploadedFiles`).
+- Updated a `@throws` annotation for the `UploadedFileInterface::moveTo()`
+  method to correctly reference the method parameter (it was referencing an
+  incorrect parameter name previously).
+
+## 1.0.0 - 2016-05-18
+
+Initial stable release; reflects accepted PSR-7 specification.
diff --git a/vendor/psr/http-message/LICENSE b/vendor/psr/http-message/LICENSE
new file mode 100644
index 000000000..c2d8e452d
--- /dev/null
+++ b/vendor/psr/http-message/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2014 PHP Framework Interoperability Group
+
+Permission is hereby granted, free of charge, to any person obtaining a copy 
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights 
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
+copies of the Software, and to permit persons to whom the Software is 
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in 
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/vendor/psr/http-message/README.md b/vendor/psr/http-message/README.md
new file mode 100644
index 000000000..2668be6c3
--- /dev/null
+++ b/vendor/psr/http-message/README.md
@@ -0,0 +1,16 @@
+PSR Http Message
+================
+
+This repository holds all interfaces/classes/traits related to
+[PSR-7](http://www.php-fig.org/psr/psr-7/).
+
+Note that this is not a HTTP message implementation of its own. It is merely an
+interface that describes a HTTP message. See the specification for more details.
+
+Usage
+-----
+
+Before reading the usage guide we recommend reading the PSR-7 interfaces method list:
+
+* [`PSR-7 Interfaces Method List`](docs/PSR7-Interfaces.md)
+* [`PSR-7 Usage Guide`](docs/PSR7-Usage.md)
\ No newline at end of file
diff --git a/vendor/psr/http-message/composer.json b/vendor/psr/http-message/composer.json
new file mode 100644
index 000000000..c66e5aba4
--- /dev/null
+++ b/vendor/psr/http-message/composer.json
@@ -0,0 +1,26 @@
+{
+    "name": "psr/http-message",
+    "description": "Common interface for HTTP messages",
+    "keywords": ["psr", "psr-7", "http", "http-message", "request", "response"],
+    "homepage": "https://github.com/php-fig/http-message",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "PHP-FIG",
+            "homepage": "https://www.php-fig.org/"
+        }
+    ],
+    "require": {
+        "php": "^7.2 || ^8.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Psr\\Http\\Message\\": "src/"
+        }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.0.x-dev"
+        }
+    }
+}
diff --git a/vendor/psr/http-message/docs/PSR7-Interfaces.md b/vendor/psr/http-message/docs/PSR7-Interfaces.md
new file mode 100644
index 000000000..3a7e7dda6
--- /dev/null
+++ b/vendor/psr/http-message/docs/PSR7-Interfaces.md
@@ -0,0 +1,130 @@
+# Interfaces
+
+The purpose of this list is to help in finding the methods when working with PSR-7. This can be considered as a cheatsheet for PSR-7 interfaces.
+
+The interfaces defined in PSR-7 are the following:
+
+| Class Name | Description |
+|---|---|
+| [Psr\Http\Message\MessageInterface](http://www.php-fig.org/psr/psr-7/#psrhttpmessagemessageinterface) | Representation of a HTTP message |
+| [Psr\Http\Message\RequestInterface](http://www.php-fig.org/psr/psr-7/#psrhttpmessagerequestinterface) | Representation of an outgoing, client-side request. |
+| [Psr\Http\Message\ServerRequestInterface](http://www.php-fig.org/psr/psr-7/#psrhttpmessageserverrequestinterface) | Representation of an incoming, server-side HTTP request. | 
+| [Psr\Http\Message\ResponseInterface](http://www.php-fig.org/psr/psr-7/#psrhttpmessageresponseinterface) | Representation of an outgoing, server-side response. |
+| [Psr\Http\Message\StreamInterface](http://www.php-fig.org/psr/psr-7/#psrhttpmessagestreaminterface) | Describes a data stream |
+| [Psr\Http\Message\UriInterface](http://www.php-fig.org/psr/psr-7/#psrhttpmessageuriinterface) | Value object representing a URI. |
+| [Psr\Http\Message\UploadedFileInterface](http://www.php-fig.org/psr/psr-7/#psrhttpmessageuploadedfileinterface) | Value object representing a file uploaded through an HTTP request. |
+
+## `Psr\Http\Message\MessageInterface` Methods
+
+| Method Name                        | Description | Notes |
+|------------------------------------| ----------- | ----- |
+| `getProtocolVersion()`             | Retrieve HTTP protocol version          |  1.0 or 1.1 |
+| `withProtocolVersion($version)`    | Returns new message instance with given HTTP protocol version          |      |
+| `getHeaders()`                     | Retrieve all HTTP Headers               | [Request Header List](https://en.wikipedia.org/wiki/List_of_HTTP_header_fields#Request_fields), [Response Header List](https://en.wikipedia.org/wiki/List_of_HTTP_header_fields#Response_fields)      |
+| `hasHeader($name)`                 | Checks if HTTP Header with given name exists  | |
+| `getHeader($name)`                 | Retrieves a array with the values for a single header | |
+| `getHeaderLine($name)`             | Retrieves a comma-separated string of the values for a single header |  |
+| `withHeader($name, $value)`        | Returns new message instance with given HTTP Header | if the header existed in the original instance, replaces the header value from the original message with the value provided when creating the new instance. |
+| `withAddedHeader($name, $value)`   | Returns new message instance with appended value to given header | If header already exists value will be appended, if not a new header will be created |
+| `withoutHeader($name)`             | Removes HTTP Header with given name| |
+| `getBody()`                        | Retrieves the HTTP Message Body | Returns object implementing `StreamInterface`|
+| `withBody(StreamInterface $body)`  | Returns new message instance with given HTTP Message Body | |
+
+
+## `Psr\Http\Message\RequestInterface` Methods
+
+Same methods as `Psr\Http\Message\MessageInterface`  + the following methods:
+
+| Method Name                        | Description | Notes |
+|------------------------------------| ----------- | ----- |
+| `getRequestTarget()`                | Retrieves the message's request target              | origin-form, absolute-form, authority-form, asterisk-form ([RFC7230](https://www.rfc-editor.org/rfc/rfc7230.txt)) |
+| `withRequestTarget($requestTarget)` | Return a new message instance with the specific request-target |      |
+| `getMethod()`                       | Retrieves the HTTP method of the request.  |  GET, HEAD, POST, PUT, DELETE, CONNECT, OPTIONS, TRACE (defined in [RFC7231](https://tools.ietf.org/html/rfc7231)), PATCH (defined in [RFC5789](https://tools.ietf.org/html/rfc5789)) |
+| `withMethod($method)`               | Returns a new message instance with the provided HTTP method  | |
+| `getUri()`                 | Retrieves the URI instance | |
+| `withUri(UriInterface $uri, $preserveHost = false)` | Returns a new message instance with the provided URI |  |
+
+
+## `Psr\Http\Message\ServerRequestInterface` Methods
+
+Same methods as `Psr\Http\Message\RequestInterface`  + the following methods:
+
+| Method Name                        | Description | Notes |
+|------------------------------------| ----------- | ----- |
+| `getServerParams() `               | Retrieve server parameters  | Typically derived from `$_SERVER`  |
+| `getCookieParams()`                | Retrieves cookies sent by the client to the server. | Typically derived from `$_COOKIES` |
+| `withCookieParams(array $cookies)` |  Returns a new request instance with the specified cookies      |   | 
+| `withQueryParams(array $query)` | Returns a new request instance with the specified query string arguments  |  |
+| `getUploadedFiles()` | Retrieve normalized file upload data  |  |
+| `withUploadedFiles(array $uploadedFiles)` | Returns a new request instance with the specified uploaded files  |  |
+| `getParsedBody()` | Retrieve any parameters provided in the request body  |  |
+| `withParsedBody($data)` | Returns a new request instance with the specified body parameters  |  |
+| `getAttributes()` | Retrieve attributes derived from the request  |  |
+| `getAttribute($name, $default = null)` | Retrieve a single derived request attribute  |  |
+| `withAttribute($name, $value)` | Returns a new request instance with the specified derived request attribute  |  |
+| `withoutAttribute($name)` | Returns a new request instance that without the specified derived request attribute  |  |
+
+## `Psr\Http\Message\ResponseInterface` Methods:
+
+Same methods as `Psr\Http\Message\MessageInterface`  + the following methods:
+
+| Method Name                        | Description | Notes |
+|------------------------------------| ----------- | ----- |
+| `getStatusCode()` | Gets the response status code. | |
+| `withStatus($code, $reasonPhrase = '')` | Returns a new response instance with the specified status code and, optionally, reason phrase. | |
+| `getReasonPhrase()` | Gets the response reason phrase associated with the status code. | |
+
+##  `Psr\Http\Message\StreamInterface` Methods
+
+| Method Name                        | Description | Notes |
+|------------------------------------| ----------- | ----- |
+| `__toString()` | Reads all data from the stream into a string, from the beginning to end. | |
+| `close()` | Closes the stream and any underlying resources. | |
+| `detach()` | Separates any underlying resources from the stream. | |
+| `getSize()` | Get the size of the stream if known. | |
+| `eof()` | Returns true if the stream is at the end of the stream.| |
+| `isSeekable()` |  Returns whether or not the stream is seekable. | |
+| `seek($offset, $whence = SEEK_SET)` | Seek to a position in the stream. | |
+| `rewind()` | Seek to the beginning of the stream. | |
+| `isWritable()` | Returns whether or not the stream is writable. | |
+| `write($string)` | Write data to the stream. | |
+| `isReadable()` | Returns whether or not the stream is readable. | |
+| `read($length)` | Read data from the stream. | |
+| `getContents()` | Returns the remaining contents in a string | |
+| `getMetadata($key = null)()` | Get stream metadata as an associative array or retrieve a specific key. | |
+
+## `Psr\Http\Message\UriInterface` Methods
+
+| Method Name                        | Description | Notes |
+|------------------------------------| ----------- | ----- |
+| `getScheme()` | Retrieve the scheme component of the URI. | |
+| `getAuthority()` | Retrieve the authority component of the URI. | |
+| `getUserInfo()` | Retrieve the user information component of the URI. | |
+| `getHost()` | Retrieve the host component of the URI. | |
+| `getPort()` | Retrieve the port component of the URI. | |
+| `getPath()` | Retrieve the path component of the URI. | |
+| `getQuery()` | Retrieve the query string of the URI. | |
+| `getFragment()` | Retrieve the fragment component of the URI. | |
+| `withScheme($scheme)` | Return an instance with the specified scheme. | |
+| `withUserInfo($user, $password = null)` | Return an instance with the specified user information. | |
+| `withHost($host)` | Return an instance with the specified host. | |
+| `withPort($port)` | Return an instance with the specified port. | |
+| `withPath($path)` | Return an instance with the specified path. | |
+| `withQuery($query)` | Return an instance with the specified query string. | |
+| `withFragment($fragment)` | Return an instance with the specified URI fragment. | |
+| `__toString()` | Return the string representation as a URI reference. | |
+
+## `Psr\Http\Message\UploadedFileInterface` Methods
+
+| Method Name                        | Description | Notes |
+|------------------------------------| ----------- | ----- |
+| `getStream()` | Retrieve a stream representing the uploaded file. | |
+| `moveTo($targetPath)` | Move the uploaded file to a new location. | |
+| `getSize()` | Retrieve the file size. | |
+| `getError()` | Retrieve the error associated with the uploaded file. | |
+| `getClientFilename()` | Retrieve the filename sent by the client. | |
+| `getClientMediaType()` | Retrieve the media type sent by the client. | |
+
+> `RequestInterface`, `ServerRequestInterface`, `ResponseInterface` extend `MessageInterface`  because the `Request` and the `Response` are `HTTP Messages`.
+> When using `ServerRequestInterface`, both `RequestInterface` and `Psr\Http\Message\MessageInterface` methods are considered.
+
diff --git a/vendor/psr/http-message/docs/PSR7-Usage.md b/vendor/psr/http-message/docs/PSR7-Usage.md
new file mode 100644
index 000000000..b6d048a34
--- /dev/null
+++ b/vendor/psr/http-message/docs/PSR7-Usage.md
@@ -0,0 +1,159 @@
+### PSR-7 Usage
+
+All PSR-7 applications comply with these interfaces 
+They were created to establish a standard between middleware implementations.
+
+> `RequestInterface`, `ServerRequestInterface`, `ResponseInterface` extend `MessageInterface`  because the `Request` and the `Response` are `HTTP Messages`.
+> When using `ServerRequestInterface`, both `RequestInterface` and `Psr\Http\Message\MessageInterface` methods are considered.
+
+
+The following examples will illustrate how basic operations are done in PSR-7.
+
+##### Examples
+
+
+For this examples to work (at least) a PSR-7 implementation package is required. (eg: zendframework/zend-diactoros, guzzlehttp/psr7, slim/slim, etc)
+All PSR-7 implementations should have the same behaviour.
+
+The following will be assumed: 
+`$request` is an object of `Psr\Http\Message\RequestInterface` and
+
+`$response` is an object implementing `Psr\Http\Message\RequestInterface`
+
+
+### Working with HTTP Headers
+
+#### Adding headers to response:
+
+```php
+$response->withHeader('My-Custom-Header', 'My Custom Message');
+```
+
+#### Appending values to headers
+
+```php
+$response->withAddedHeader('My-Custom-Header', 'The second message');
+```
+
+#### Checking if header exists:
+
+```php
+$request->hasHeader('My-Custom-Header'); // will return false
+$response->hasHeader('My-Custom-Header'); // will return true
+```
+
+> Note: My-Custom-Header was only added in the Response
+
+#### Getting comma-separated values from a header (also applies to request)
+
+```php
+// getting value from request headers
+$request->getHeaderLine('Content-Type'); // will return: "text/html; charset=UTF-8"
+// getting value from response headers
+$response->getHeaderLine('My-Custom-Header'); // will return:  "My Custom Message; The second message"
+```
+
+#### Getting array of value from a header (also applies to request)
+```php
+// getting value from request headers
+$request->getHeader('Content-Type'); // will return: ["text/html", "charset=UTF-8"]
+// getting value from response headers
+$response->getHeader('My-Custom-Header'); // will return:  ["My Custom Message",  "The second message"]
+```
+
+#### Removing headers from HTTP Messages
+```php
+// removing a header from Request, removing deprecated "Content-MD5" header
+$request->withoutHeader('Content-MD5'); 
+
+// removing a header from Response
+// effect: the browser won't know the size of the stream
+// the browser will download the stream till it ends
+$response->withoutHeader('Content-Length');
+```
+
+### Working with HTTP Message Body
+
+When working with the PSR-7 there are two methods of implementation:
+#### 1. Getting the body separately
+
+> This method makes the body handling easier to understand and is useful when repeatedly calling body methods. (You only call `getBody()` once). Using this method mistakes like `$response->write()` are also prevented.
+
+```php
+$body = $response->getBody();
+// operations on body, eg. read, write, seek
+// ...
+// replacing the old body
+$response->withBody($body); 
+// this last statement is optional as we working with objects
+// in this case the "new" body is same with the "old" one
+// the $body variable has the same value as the one in $request, only the reference is passed
+```
+
+#### 2. Working directly on response
+
+> This method is useful when only performing few operations as the `$request->getBody()` statement fragment is required
+
+```php
+$response->getBody()->write('hello');
+```
+
+### Getting the body contents
+
+The following snippet gets the contents of a stream contents.
+> Note: Streams must be rewinded, if content was written into streams, it will be ignored when calling `getContents()` because the stream pointer is set to the last character, which is `\0` - meaning end of stream.
+```php 
+$body = $response->getBody();
+$body->rewind(); // or $body->seek(0);
+$bodyText = $body->getContents();
+```
+> Note: If `$body->seek(1)` is called before `$body->getContents()`, the first character will be ommited as the starting pointer is set to `1`, not `0`. This is why using `$body->rewind()` is recommended.
+
+### Append to body
+
+```php
+$response->getBody()->write('Hello'); // writing directly
+$body = $request->getBody(); // which is a `StreamInterface`
+$body->write('xxxxx');
+```
+
+### Prepend to body
+Prepending is different when it comes to streams. The content must be copied before writing the content to be prepended.
+The following example will explain the behaviour of streams.
+
+```php
+// assuming our response is initially empty
+$body = $repsonse->getBody();
+// writing the string "abcd"
+$body->write('abcd');
+
+// seeking to start of stream
+$body->seek(0);
+// writing 'ef'
+$body->write('ef'); // at this point the stream contains "efcd"
+```
+
+#### Prepending by rewriting separately
+
+```php
+// assuming our response body stream only contains: "abcd"
+$body = $response->getBody();
+$body->rewind();
+$contents = $body->getContents(); // abcd
+// seeking the stream to beginning
+$body->rewind();
+$body->write('ef'); // stream contains "efcd"
+$body->write($contents); // stream contains "efabcd"
+```
+
+> Note: `getContents()` seeks the stream while reading it, therefore if the second `rewind()` method call was not present the stream would have resulted in `abcdefabcd` because the `write()` method appends to stream if not preceeded by `rewind()` or `seek(0)`.
+
+#### Prepending by using contents as a string
+```php
+$body = $response->getBody();
+$body->rewind();
+$contents = $body->getContents(); // efabcd
+$contents = 'ef'.$contents;
+$body->rewind();
+$body->write($contents);
+```
diff --git a/vendor/psr/http-message/src/MessageInterface.php b/vendor/psr/http-message/src/MessageInterface.php
new file mode 100644
index 000000000..a83c98518
--- /dev/null
+++ b/vendor/psr/http-message/src/MessageInterface.php
@@ -0,0 +1,187 @@
+<?php
+
+namespace Psr\Http\Message;
+
+/**
+ * HTTP messages consist of requests from a client to a server and responses
+ * from a server to a client. This interface defines the methods common to
+ * each.
+ *
+ * Messages are considered immutable; all methods that might change state MUST
+ * be implemented such that they retain the internal state of the current
+ * message and return an instance that contains the changed state.
+ *
+ * @link http://www.ietf.org/rfc/rfc7230.txt
+ * @link http://www.ietf.org/rfc/rfc7231.txt
+ */
+interface MessageInterface
+{
+    /**
+     * Retrieves the HTTP protocol version as a string.
+     *
+     * The string MUST contain only the HTTP version number (e.g., "1.1", "1.0").
+     *
+     * @return string HTTP protocol version.
+     */
+    public function getProtocolVersion(): string;
+
+    /**
+     * Return an instance with the specified HTTP protocol version.
+     *
+     * The version string MUST contain only the HTTP version number (e.g.,
+     * "1.1", "1.0").
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new protocol version.
+     *
+     * @param string $version HTTP protocol version
+     * @return static
+     */
+    public function withProtocolVersion(string $version): MessageInterface;
+
+    /**
+     * Retrieves all message header values.
+     *
+     * The keys represent the header name as it will be sent over the wire, and
+     * each value is an array of strings associated with the header.
+     *
+     *     // Represent the headers as a string
+     *     foreach ($message->getHeaders() as $name => $values) {
+     *         echo $name . ": " . implode(", ", $values);
+     *     }
+     *
+     *     // Emit headers iteratively:
+     *     foreach ($message->getHeaders() as $name => $values) {
+     *         foreach ($values as $value) {
+     *             header(sprintf('%s: %s', $name, $value), false);
+     *         }
+     *     }
+     *
+     * While header names are not case-sensitive, getHeaders() will preserve the
+     * exact case in which headers were originally specified.
+     *
+     * @return string[][] Returns an associative array of the message's headers. Each
+     *     key MUST be a header name, and each value MUST be an array of strings
+     *     for that header.
+     */
+    public function getHeaders(): array;
+
+    /**
+     * Checks if a header exists by the given case-insensitive name.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @return bool Returns true if any header names match the given header
+     *     name using a case-insensitive string comparison. Returns false if
+     *     no matching header name is found in the message.
+     */
+    public function hasHeader(string $name): bool;
+
+    /**
+     * Retrieves a message header value by the given case-insensitive name.
+     *
+     * This method returns an array of all the header values of the given
+     * case-insensitive header name.
+     *
+     * If the header does not appear in the message, this method MUST return an
+     * empty array.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @return string[] An array of string values as provided for the given
+     *    header. If the header does not appear in the message, this method MUST
+     *    return an empty array.
+     */
+    public function getHeader(string $name): array;
+
+    /**
+     * Retrieves a comma-separated string of the values for a single header.
+     *
+     * This method returns all of the header values of the given
+     * case-insensitive header name as a string concatenated together using
+     * a comma.
+     *
+     * NOTE: Not all header values may be appropriately represented using
+     * comma concatenation. For such headers, use getHeader() instead
+     * and supply your own delimiter when concatenating.
+     *
+     * If the header does not appear in the message, this method MUST return
+     * an empty string.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @return string A string of values as provided for the given header
+     *    concatenated together using a comma. If the header does not appear in
+     *    the message, this method MUST return an empty string.
+     */
+    public function getHeaderLine(string $name): string;
+
+    /**
+     * Return an instance with the provided value replacing the specified header.
+     *
+     * While header names are case-insensitive, the casing of the header will
+     * be preserved by this function, and returned from getHeaders().
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new and/or updated header and value.
+     *
+     * @param string $name Case-insensitive header field name.
+     * @param string|string[] $value Header value(s).
+     * @return static
+     * @throws \InvalidArgumentException for invalid header names or values.
+     */
+    public function withHeader(string $name, $value): MessageInterface;
+
+    /**
+     * Return an instance with the specified header appended with the given value.
+     *
+     * Existing values for the specified header will be maintained. The new
+     * value(s) will be appended to the existing list. If the header did not
+     * exist previously, it will be added.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new header and/or value.
+     *
+     * @param string $name Case-insensitive header field name to add.
+     * @param string|string[] $value Header value(s).
+     * @return static
+     * @throws \InvalidArgumentException for invalid header names or values.
+     */
+    public function withAddedHeader(string $name, $value): MessageInterface;
+
+    /**
+     * Return an instance without the specified header.
+     *
+     * Header resolution MUST be done without case-sensitivity.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that removes
+     * the named header.
+     *
+     * @param string $name Case-insensitive header field name to remove.
+     * @return static
+     */
+    public function withoutHeader(string $name): MessageInterface;
+
+    /**
+     * Gets the body of the message.
+     *
+     * @return StreamInterface Returns the body as a stream.
+     */
+    public function getBody(): StreamInterface;
+
+    /**
+     * Return an instance with the specified message body.
+     *
+     * The body MUST be a StreamInterface object.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return a new instance that has the
+     * new body stream.
+     *
+     * @param StreamInterface $body Body.
+     * @return static
+     * @throws \InvalidArgumentException When the body is not valid.
+     */
+    public function withBody(StreamInterface $body): MessageInterface;
+}
diff --git a/vendor/psr/http-message/src/RequestInterface.php b/vendor/psr/http-message/src/RequestInterface.php
new file mode 100644
index 000000000..33f85e559
--- /dev/null
+++ b/vendor/psr/http-message/src/RequestInterface.php
@@ -0,0 +1,130 @@
+<?php
+
+namespace Psr\Http\Message;
+
+/**
+ * Representation of an outgoing, client-side request.
+ *
+ * Per the HTTP specification, this interface includes properties for
+ * each of the following:
+ *
+ * - Protocol version
+ * - HTTP method
+ * - URI
+ * - Headers
+ * - Message body
+ *
+ * During construction, implementations MUST attempt to set the Host header from
+ * a provided URI if no Host header is provided.
+ *
+ * Requests are considered immutable; all methods that might change state MUST
+ * be implemented such that they retain the internal state of the current
+ * message and return an instance that contains the changed state.
+ */
+interface RequestInterface extends MessageInterface
+{
+    /**
+     * Retrieves the message's request target.
+     *
+     * Retrieves the message's request-target either as it will appear (for
+     * clients), as it appeared at request (for servers), or as it was
+     * specified for the instance (see withRequestTarget()).
+     *
+     * In most cases, this will be the origin-form of the composed URI,
+     * unless a value was provided to the concrete implementation (see
+     * withRequestTarget() below).
+     *
+     * If no URI is available, and no request-target has been specifically
+     * provided, this method MUST return the string "/".
+     *
+     * @return string
+     */
+    public function getRequestTarget(): string;
+
+    /**
+     * Return an instance with the specific request-target.
+     *
+     * If the request needs a non-origin-form request-target — e.g., for
+     * specifying an absolute-form, authority-form, or asterisk-form —
+     * this method may be used to create an instance with the specified
+     * request-target, verbatim.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * changed request target.
+     *
+     * @link http://tools.ietf.org/html/rfc7230#section-5.3 (for the various
+     *     request-target forms allowed in request messages)
+     * @param string $requestTarget
+     * @return static
+     */
+    public function withRequestTarget(string $requestTarget): RequestInterface;
+
+
+    /**
+     * Retrieves the HTTP method of the request.
+     *
+     * @return string Returns the request method.
+     */
+    public function getMethod(): string;
+
+    /**
+     * Return an instance with the provided HTTP method.
+     *
+     * While HTTP method names are typically all uppercase characters, HTTP
+     * method names are case-sensitive and thus implementations SHOULD NOT
+     * modify the given string.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * changed request method.
+     *
+     * @param string $method Case-sensitive method.
+     * @return static
+     * @throws \InvalidArgumentException for invalid HTTP methods.
+     */
+    public function withMethod(string $method): RequestInterface;
+
+    /**
+     * Retrieves the URI instance.
+     *
+     * This method MUST return a UriInterface instance.
+     *
+     * @link http://tools.ietf.org/html/rfc3986#section-4.3
+     * @return UriInterface Returns a UriInterface instance
+     *     representing the URI of the request.
+     */
+    public function getUri(): UriInterface;
+
+    /**
+     * Returns an instance with the provided URI.
+     *
+     * This method MUST update the Host header of the returned request by
+     * default if the URI contains a host component. If the URI does not
+     * contain a host component, any pre-existing Host header MUST be carried
+     * over to the returned request.
+     *
+     * You can opt-in to preserving the original state of the Host header by
+     * setting `$preserveHost` to `true`. When `$preserveHost` is set to
+     * `true`, this method interacts with the Host header in the following ways:
+     *
+     * - If the Host header is missing or empty, and the new URI contains
+     *   a host component, this method MUST update the Host header in the returned
+     *   request.
+     * - If the Host header is missing or empty, and the new URI does not contain a
+     *   host component, this method MUST NOT update the Host header in the returned
+     *   request.
+     * - If a Host header is present and non-empty, this method MUST NOT update
+     *   the Host header in the returned request.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new UriInterface instance.
+     *
+     * @link http://tools.ietf.org/html/rfc3986#section-4.3
+     * @param UriInterface $uri New request URI to use.
+     * @param bool $preserveHost Preserve the original state of the Host header.
+     * @return static
+     */
+    public function withUri(UriInterface $uri, bool $preserveHost = false): RequestInterface;
+}
diff --git a/vendor/psr/http-message/src/ResponseInterface.php b/vendor/psr/http-message/src/ResponseInterface.php
new file mode 100644
index 000000000..e9299a914
--- /dev/null
+++ b/vendor/psr/http-message/src/ResponseInterface.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace Psr\Http\Message;
+
+/**
+ * Representation of an outgoing, server-side response.
+ *
+ * Per the HTTP specification, this interface includes properties for
+ * each of the following:
+ *
+ * - Protocol version
+ * - Status code and reason phrase
+ * - Headers
+ * - Message body
+ *
+ * Responses are considered immutable; all methods that might change state MUST
+ * be implemented such that they retain the internal state of the current
+ * message and return an instance that contains the changed state.
+ */
+interface ResponseInterface extends MessageInterface
+{
+    /**
+     * Gets the response status code.
+     *
+     * The status code is a 3-digit integer result code of the server's attempt
+     * to understand and satisfy the request.
+     *
+     * @return int Status code.
+     */
+    public function getStatusCode(): int;
+
+    /**
+     * Return an instance with the specified status code and, optionally, reason phrase.
+     *
+     * If no reason phrase is specified, implementations MAY choose to default
+     * to the RFC 7231 or IANA recommended reason phrase for the response's
+     * status code.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated status and reason phrase.
+     *
+     * @link http://tools.ietf.org/html/rfc7231#section-6
+     * @link http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
+     * @param int $code The 3-digit integer result code to set.
+     * @param string $reasonPhrase The reason phrase to use with the
+     *     provided status code; if none is provided, implementations MAY
+     *     use the defaults as suggested in the HTTP specification.
+     * @return static
+     * @throws \InvalidArgumentException For invalid status code arguments.
+     */
+    public function withStatus(int $code, string $reasonPhrase = ''): ResponseInterface;
+
+    /**
+     * Gets the response reason phrase associated with the status code.
+     *
+     * Because a reason phrase is not a required element in a response
+     * status line, the reason phrase value MAY be null. Implementations MAY
+     * choose to return the default RFC 7231 recommended reason phrase (or those
+     * listed in the IANA HTTP Status Code Registry) for the response's
+     * status code.
+     *
+     * @link http://tools.ietf.org/html/rfc7231#section-6
+     * @link http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
+     * @return string Reason phrase; must return an empty string if none present.
+     */
+    public function getReasonPhrase(): string;
+}
diff --git a/vendor/psr/http-message/src/ServerRequestInterface.php b/vendor/psr/http-message/src/ServerRequestInterface.php
new file mode 100644
index 000000000..8625d0e10
--- /dev/null
+++ b/vendor/psr/http-message/src/ServerRequestInterface.php
@@ -0,0 +1,261 @@
+<?php
+
+namespace Psr\Http\Message;
+
+/**
+ * Representation of an incoming, server-side HTTP request.
+ *
+ * Per the HTTP specification, this interface includes properties for
+ * each of the following:
+ *
+ * - Protocol version
+ * - HTTP method
+ * - URI
+ * - Headers
+ * - Message body
+ *
+ * Additionally, it encapsulates all data as it has arrived to the
+ * application from the CGI and/or PHP environment, including:
+ *
+ * - The values represented in $_SERVER.
+ * - Any cookies provided (generally via $_COOKIE)
+ * - Query string arguments (generally via $_GET, or as parsed via parse_str())
+ * - Upload files, if any (as represented by $_FILES)
+ * - Deserialized body parameters (generally from $_POST)
+ *
+ * $_SERVER values MUST be treated as immutable, as they represent application
+ * state at the time of request; as such, no methods are provided to allow
+ * modification of those values. The other values provide such methods, as they
+ * can be restored from $_SERVER or the request body, and may need treatment
+ * during the application (e.g., body parameters may be deserialized based on
+ * content type).
+ *
+ * Additionally, this interface recognizes the utility of introspecting a
+ * request to derive and match additional parameters (e.g., via URI path
+ * matching, decrypting cookie values, deserializing non-form-encoded body
+ * content, matching authorization headers to users, etc). These parameters
+ * are stored in an "attributes" property.
+ *
+ * Requests are considered immutable; all methods that might change state MUST
+ * be implemented such that they retain the internal state of the current
+ * message and return an instance that contains the changed state.
+ */
+interface ServerRequestInterface extends RequestInterface
+{
+    /**
+     * Retrieve server parameters.
+     *
+     * Retrieves data related to the incoming request environment,
+     * typically derived from PHP's $_SERVER superglobal. The data IS NOT
+     * REQUIRED to originate from $_SERVER.
+     *
+     * @return array
+     */
+    public function getServerParams(): array;
+
+    /**
+     * Retrieve cookies.
+     *
+     * Retrieves cookies sent by the client to the server.
+     *
+     * The data MUST be compatible with the structure of the $_COOKIE
+     * superglobal.
+     *
+     * @return array
+     */
+    public function getCookieParams(): array;
+
+    /**
+     * Return an instance with the specified cookies.
+     *
+     * The data IS NOT REQUIRED to come from the $_COOKIE superglobal, but MUST
+     * be compatible with the structure of $_COOKIE. Typically, this data will
+     * be injected at instantiation.
+     *
+     * This method MUST NOT update the related Cookie header of the request
+     * instance, nor related values in the server params.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated cookie values.
+     *
+     * @param array $cookies Array of key/value pairs representing cookies.
+     * @return static
+     */
+    public function withCookieParams(array $cookies): ServerRequestInterface;
+
+    /**
+     * Retrieve query string arguments.
+     *
+     * Retrieves the deserialized query string arguments, if any.
+     *
+     * Note: the query params might not be in sync with the URI or server
+     * params. If you need to ensure you are only getting the original
+     * values, you may need to parse the query string from `getUri()->getQuery()`
+     * or from the `QUERY_STRING` server param.
+     *
+     * @return array
+     */
+    public function getQueryParams(): array;
+
+    /**
+     * Return an instance with the specified query string arguments.
+     *
+     * These values SHOULD remain immutable over the course of the incoming
+     * request. They MAY be injected during instantiation, such as from PHP's
+     * $_GET superglobal, or MAY be derived from some other value such as the
+     * URI. In cases where the arguments are parsed from the URI, the data
+     * MUST be compatible with what PHP's parse_str() would return for
+     * purposes of how duplicate query parameters are handled, and how nested
+     * sets are handled.
+     *
+     * Setting query string arguments MUST NOT change the URI stored by the
+     * request, nor the values in the server params.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated query string arguments.
+     *
+     * @param array $query Array of query string arguments, typically from
+     *     $_GET.
+     * @return static
+     */
+    public function withQueryParams(array $query): ServerRequestInterface;
+
+    /**
+     * Retrieve normalized file upload data.
+     *
+     * This method returns upload metadata in a normalized tree, with each leaf
+     * an instance of Psr\Http\Message\UploadedFileInterface.
+     *
+     * These values MAY be prepared from $_FILES or the message body during
+     * instantiation, or MAY be injected via withUploadedFiles().
+     *
+     * @return array An array tree of UploadedFileInterface instances; an empty
+     *     array MUST be returned if no data is present.
+     */
+    public function getUploadedFiles(): array;
+
+    /**
+     * Create a new instance with the specified uploaded files.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated body parameters.
+     *
+     * @param array $uploadedFiles An array tree of UploadedFileInterface instances.
+     * @return static
+     * @throws \InvalidArgumentException if an invalid structure is provided.
+     */
+    public function withUploadedFiles(array $uploadedFiles): ServerRequestInterface;
+
+    /**
+     * Retrieve any parameters provided in the request body.
+     *
+     * If the request Content-Type is either application/x-www-form-urlencoded
+     * or multipart/form-data, and the request method is POST, this method MUST
+     * return the contents of $_POST.
+     *
+     * Otherwise, this method may return any results of deserializing
+     * the request body content; as parsing returns structured content, the
+     * potential types MUST be arrays or objects only. A null value indicates
+     * the absence of body content.
+     *
+     * @return null|array|object The deserialized body parameters, if any.
+     *     These will typically be an array or object.
+     */
+    public function getParsedBody();
+
+    /**
+     * Return an instance with the specified body parameters.
+     *
+     * These MAY be injected during instantiation.
+     *
+     * If the request Content-Type is either application/x-www-form-urlencoded
+     * or multipart/form-data, and the request method is POST, use this method
+     * ONLY to inject the contents of $_POST.
+     *
+     * The data IS NOT REQUIRED to come from $_POST, but MUST be the results of
+     * deserializing the request body content. Deserialization/parsing returns
+     * structured data, and, as such, this method ONLY accepts arrays or objects,
+     * or a null value if nothing was available to parse.
+     *
+     * As an example, if content negotiation determines that the request data
+     * is a JSON payload, this method could be used to create a request
+     * instance with the deserialized parameters.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated body parameters.
+     *
+     * @param null|array|object $data The deserialized body data. This will
+     *     typically be in an array or object.
+     * @return static
+     * @throws \InvalidArgumentException if an unsupported argument type is
+     *     provided.
+     */
+    public function withParsedBody($data): ServerRequestInterface;
+
+    /**
+     * Retrieve attributes derived from the request.
+     *
+     * The request "attributes" may be used to allow injection of any
+     * parameters derived from the request: e.g., the results of path
+     * match operations; the results of decrypting cookies; the results of
+     * deserializing non-form-encoded message bodies; etc. Attributes
+     * will be application and request specific, and CAN be mutable.
+     *
+     * @return array Attributes derived from the request.
+     */
+    public function getAttributes(): array;
+
+    /**
+     * Retrieve a single derived request attribute.
+     *
+     * Retrieves a single derived request attribute as described in
+     * getAttributes(). If the attribute has not been previously set, returns
+     * the default value as provided.
+     *
+     * This method obviates the need for a hasAttribute() method, as it allows
+     * specifying a default value to return if the attribute is not found.
+     *
+     * @see getAttributes()
+     * @param string $name The attribute name.
+     * @param mixed $default Default value to return if the attribute does not exist.
+     * @return mixed
+     */
+    public function getAttribute(string $name, $default = null);
+
+    /**
+     * Return an instance with the specified derived request attribute.
+     *
+     * This method allows setting a single derived request attribute as
+     * described in getAttributes().
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * updated attribute.
+     *
+     * @see getAttributes()
+     * @param string $name The attribute name.
+     * @param mixed $value The value of the attribute.
+     * @return static
+     */
+    public function withAttribute(string $name, $value): ServerRequestInterface;
+
+    /**
+     * Return an instance that removes the specified derived request attribute.
+     *
+     * This method allows removing a single derived request attribute as
+     * described in getAttributes().
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that removes
+     * the attribute.
+     *
+     * @see getAttributes()
+     * @param string $name The attribute name.
+     * @return static
+     */
+    public function withoutAttribute(string $name): ServerRequestInterface;
+}
diff --git a/vendor/psr/http-message/src/StreamInterface.php b/vendor/psr/http-message/src/StreamInterface.php
new file mode 100644
index 000000000..a62aabb82
--- /dev/null
+++ b/vendor/psr/http-message/src/StreamInterface.php
@@ -0,0 +1,158 @@
+<?php
+
+namespace Psr\Http\Message;
+
+/**
+ * Describes a data stream.
+ *
+ * Typically, an instance will wrap a PHP stream; this interface provides
+ * a wrapper around the most common operations, including serialization of
+ * the entire stream to a string.
+ */
+interface StreamInterface
+{
+    /**
+     * Reads all data from the stream into a string, from the beginning to end.
+     *
+     * This method MUST attempt to seek to the beginning of the stream before
+     * reading data and read the stream until the end is reached.
+     *
+     * Warning: This could attempt to load a large amount of data into memory.
+     *
+     * This method MUST NOT raise an exception in order to conform with PHP's
+     * string casting operations.
+     *
+     * @see http://php.net/manual/en/language.oop5.magic.php#object.tostring
+     * @return string
+     */
+    public function __toString(): string;
+
+    /**
+     * Closes the stream and any underlying resources.
+     *
+     * @return void
+     */
+    public function close(): void;
+
+    /**
+     * Separates any underlying resources from the stream.
+     *
+     * After the stream has been detached, the stream is in an unusable state.
+     *
+     * @return resource|null Underlying PHP stream, if any
+     */
+    public function detach();
+
+    /**
+     * Get the size of the stream if known.
+     *
+     * @return int|null Returns the size in bytes if known, or null if unknown.
+     */
+    public function getSize(): ?int;
+
+    /**
+     * Returns the current position of the file read/write pointer
+     *
+     * @return int Position of the file pointer
+     * @throws \RuntimeException on error.
+     */
+    public function tell(): int;
+
+    /**
+     * Returns true if the stream is at the end of the stream.
+     *
+     * @return bool
+     */
+    public function eof(): bool;
+
+    /**
+     * Returns whether or not the stream is seekable.
+     *
+     * @return bool
+     */
+    public function isSeekable(): bool;
+
+    /**
+     * Seek to a position in the stream.
+     *
+     * @link http://www.php.net/manual/en/function.fseek.php
+     * @param int $offset Stream offset
+     * @param int $whence Specifies how the cursor position will be calculated
+     *     based on the seek offset. Valid values are identical to the built-in
+     *     PHP $whence values for `fseek()`.  SEEK_SET: Set position equal to
+     *     offset bytes SEEK_CUR: Set position to current location plus offset
+     *     SEEK_END: Set position to end-of-stream plus offset.
+     * @throws \RuntimeException on failure.
+     */
+    public function seek(int $offset, int $whence = SEEK_SET): void;
+
+    /**
+     * Seek to the beginning of the stream.
+     *
+     * If the stream is not seekable, this method will raise an exception;
+     * otherwise, it will perform a seek(0).
+     *
+     * @see seek()
+     * @link http://www.php.net/manual/en/function.fseek.php
+     * @throws \RuntimeException on failure.
+     */
+    public function rewind(): void;
+
+    /**
+     * Returns whether or not the stream is writable.
+     *
+     * @return bool
+     */
+    public function isWritable(): bool;
+
+    /**
+     * Write data to the stream.
+     *
+     * @param string $string The string that is to be written.
+     * @return int Returns the number of bytes written to the stream.
+     * @throws \RuntimeException on failure.
+     */
+    public function write(string $string): int;
+
+    /**
+     * Returns whether or not the stream is readable.
+     *
+     * @return bool
+     */
+    public function isReadable(): bool;
+
+    /**
+     * Read data from the stream.
+     *
+     * @param int $length Read up to $length bytes from the object and return
+     *     them. Fewer than $length bytes may be returned if underlying stream
+     *     call returns fewer bytes.
+     * @return string Returns the data read from the stream, or an empty string
+     *     if no bytes are available.
+     * @throws \RuntimeException if an error occurs.
+     */
+    public function read(int $length): string;
+
+    /**
+     * Returns the remaining contents in a string
+     *
+     * @return string
+     * @throws \RuntimeException if unable to read or an error occurs while
+     *     reading.
+     */
+    public function getContents(): string;
+
+    /**
+     * Get stream metadata as an associative array or retrieve a specific key.
+     *
+     * The keys returned are identical to the keys returned from PHP's
+     * stream_get_meta_data() function.
+     *
+     * @link http://php.net/manual/en/function.stream-get-meta-data.php
+     * @param string|null $key Specific metadata to retrieve.
+     * @return array|mixed|null Returns an associative array if no key is
+     *     provided. Returns a specific key value if a key is provided and the
+     *     value is found, or null if the key is not found.
+     */
+    public function getMetadata(?string $key = null);
+}
diff --git a/vendor/psr/http-message/src/UploadedFileInterface.php b/vendor/psr/http-message/src/UploadedFileInterface.php
new file mode 100644
index 000000000..dd19d6538
--- /dev/null
+++ b/vendor/psr/http-message/src/UploadedFileInterface.php
@@ -0,0 +1,123 @@
+<?php
+
+namespace Psr\Http\Message;
+
+/**
+ * Value object representing a file uploaded through an HTTP request.
+ *
+ * Instances of this interface are considered immutable; all methods that
+ * might change state MUST be implemented such that they retain the internal
+ * state of the current instance and return an instance that contains the
+ * changed state.
+ */
+interface UploadedFileInterface
+{
+    /**
+     * Retrieve a stream representing the uploaded file.
+     *
+     * This method MUST return a StreamInterface instance, representing the
+     * uploaded file. The purpose of this method is to allow utilizing native PHP
+     * stream functionality to manipulate the file upload, such as
+     * stream_copy_to_stream() (though the result will need to be decorated in a
+     * native PHP stream wrapper to work with such functions).
+     *
+     * If the moveTo() method has been called previously, this method MUST raise
+     * an exception.
+     *
+     * @return StreamInterface Stream representation of the uploaded file.
+     * @throws \RuntimeException in cases when no stream is available or can be
+     *     created.
+     */
+    public function getStream(): StreamInterface;
+
+    /**
+     * Move the uploaded file to a new location.
+     *
+     * Use this method as an alternative to move_uploaded_file(). This method is
+     * guaranteed to work in both SAPI and non-SAPI environments.
+     * Implementations must determine which environment they are in, and use the
+     * appropriate method (move_uploaded_file(), rename(), or a stream
+     * operation) to perform the operation.
+     *
+     * $targetPath may be an absolute path, or a relative path. If it is a
+     * relative path, resolution should be the same as used by PHP's rename()
+     * function.
+     *
+     * The original file or stream MUST be removed on completion.
+     *
+     * If this method is called more than once, any subsequent calls MUST raise
+     * an exception.
+     *
+     * When used in an SAPI environment where $_FILES is populated, when writing
+     * files via moveTo(), is_uploaded_file() and move_uploaded_file() SHOULD be
+     * used to ensure permissions and upload status are verified correctly.
+     *
+     * If you wish to move to a stream, use getStream(), as SAPI operations
+     * cannot guarantee writing to stream destinations.
+     *
+     * @see http://php.net/is_uploaded_file
+     * @see http://php.net/move_uploaded_file
+     * @param string $targetPath Path to which to move the uploaded file.
+     * @throws \InvalidArgumentException if the $targetPath specified is invalid.
+     * @throws \RuntimeException on any error during the move operation, or on
+     *     the second or subsequent call to the method.
+     */
+    public function moveTo(string $targetPath): void;
+    
+    /**
+     * Retrieve the file size.
+     *
+     * Implementations SHOULD return the value stored in the "size" key of
+     * the file in the $_FILES array if available, as PHP calculates this based
+     * on the actual size transmitted.
+     *
+     * @return int|null The file size in bytes or null if unknown.
+     */
+    public function getSize(): ?int;
+    
+    /**
+     * Retrieve the error associated with the uploaded file.
+     *
+     * The return value MUST be one of PHP's UPLOAD_ERR_XXX constants.
+     *
+     * If the file was uploaded successfully, this method MUST return
+     * UPLOAD_ERR_OK.
+     *
+     * Implementations SHOULD return the value stored in the "error" key of
+     * the file in the $_FILES array.
+     *
+     * @see http://php.net/manual/en/features.file-upload.errors.php
+     * @return int One of PHP's UPLOAD_ERR_XXX constants.
+     */
+    public function getError(): int;
+    
+    /**
+     * Retrieve the filename sent by the client.
+     *
+     * Do not trust the value returned by this method. A client could send
+     * a malicious filename with the intention to corrupt or hack your
+     * application.
+     *
+     * Implementations SHOULD return the value stored in the "name" key of
+     * the file in the $_FILES array.
+     *
+     * @return string|null The filename sent by the client or null if none
+     *     was provided.
+     */
+    public function getClientFilename(): ?string;
+    
+    /**
+     * Retrieve the media type sent by the client.
+     *
+     * Do not trust the value returned by this method. A client could send
+     * a malicious media type with the intention to corrupt or hack your
+     * application.
+     *
+     * Implementations SHOULD return the value stored in the "type" key of
+     * the file in the $_FILES array.
+     *
+     * @return string|null The media type sent by the client or null if none
+     *     was provided.
+     */
+    public function getClientMediaType(): ?string;
+}
diff --git a/vendor/psr/http-message/src/UriInterface.php b/vendor/psr/http-message/src/UriInterface.php
new file mode 100644
index 000000000..15e2cf286
--- /dev/null
+++ b/vendor/psr/http-message/src/UriInterface.php
@@ -0,0 +1,324 @@
+<?php
+
+namespace Psr\Http\Message;
+
+/**
+ * Value object representing a URI.
+ *
+ * This interface is meant to represent URIs according to RFC 3986 and to
+ * provide methods for most common operations. Additional functionality for
+ * working with URIs can be provided on top of the interface or externally.
+ * Its primary use is for HTTP requests, but may also be used in other
+ * contexts.
+ *
+ * Instances of this interface are considered immutable; all methods that
+ * might change state MUST be implemented such that they retain the internal
+ * state of the current instance and return an instance that contains the
+ * changed state.
+ *
+ * Typically the Host header will be also be present in the request message.
+ * For server-side requests, the scheme will typically be discoverable in the
+ * server parameters.
+ *
+ * @link http://tools.ietf.org/html/rfc3986 (the URI specification)
+ */
+interface UriInterface
+{
+    /**
+     * Retrieve the scheme component of the URI.
+     *
+     * If no scheme is present, this method MUST return an empty string.
+     *
+     * The value returned MUST be normalized to lowercase, per RFC 3986
+     * Section 3.1.
+     *
+     * The trailing ":" character is not part of the scheme and MUST NOT be
+     * added.
+     *
+     * @see https://tools.ietf.org/html/rfc3986#section-3.1
+     * @return string The URI scheme.
+     */
+    public function getScheme(): string;
+
+    /**
+     * Retrieve the authority component of the URI.
+     *
+     * If no authority information is present, this method MUST return an empty
+     * string.
+     *
+     * The authority syntax of the URI is:
+     *
+     * <pre>
+     * [user-info@]host[:port]
+     * </pre>
+     *
+     * If the port component is not set or is the standard port for the current
+     * scheme, it SHOULD NOT be included.
+     *
+     * @see https://tools.ietf.org/html/rfc3986#section-3.2
+     * @return string The URI authority, in "[user-info@]host[:port]" format.
+     */
+    public function getAuthority(): string;
+
+    /**
+     * Retrieve the user information component of the URI.
+     *
+     * If no user information is present, this method MUST return an empty
+     * string.
+     *
+     * If a user is present in the URI, this will return that value;
+     * additionally, if the password is also present, it will be appended to the
+     * user value, with a colon (":") separating the values.
+     *
+     * The trailing "@" character is not part of the user information and MUST
+     * NOT be added.
+     *
+     * @return string The URI user information, in "username[:password]" format.
+     */
+    public function getUserInfo(): string;
+
+    /**
+     * Retrieve the host component of the URI.
+     *
+     * If no host is present, this method MUST return an empty string.
+     *
+     * The value returned MUST be normalized to lowercase, per RFC 3986
+     * Section 3.2.2.
+     *
+     * @see http://tools.ietf.org/html/rfc3986#section-3.2.2
+     * @return string The URI host.
+     */
+    public function getHost(): string;
+
+    /**
+     * Retrieve the port component of the URI.
+     *
+     * If a port is present, and it is non-standard for the current scheme,
+     * this method MUST return it as an integer. If the port is the standard port
+     * used with the current scheme, this method SHOULD return null.
+     *
+     * If no port is present, and no scheme is present, this method MUST return
+     * a null value.
+     *
+     * If no port is present, but a scheme is present, this method MAY return
+     * the standard port for that scheme, but SHOULD return null.
+     *
+     * @return null|int The URI port.
+     */
+    public function getPort(): ?int;
+
+    /**
+     * Retrieve the path component of the URI.
+     *
+     * The path can either be empty or absolute (starting with a slash) or
+     * rootless (not starting with a slash). Implementations MUST support all
+     * three syntaxes.
+     *
+     * Normally, the empty path "" and absolute path "/" are considered equal as
+     * defined in RFC 7230 Section 2.7.3. But this method MUST NOT automatically
+     * do this normalization because in contexts with a trimmed base path, e.g.
+     * the front controller, this difference becomes significant. It's the task
+     * of the user to handle both "" and "/".
+     *
+     * The value returned MUST be percent-encoded, but MUST NOT double-encode
+     * any characters. To determine what characters to encode, please refer to
+     * RFC 3986, Sections 2 and 3.3.
+     *
+     * As an example, if the value should include a slash ("/") not intended as
+     * delimiter between path segments, that value MUST be passed in encoded
+     * form (e.g., "%2F") to the instance.
+     *
+     * @see https://tools.ietf.org/html/rfc3986#section-2
+     * @see https://tools.ietf.org/html/rfc3986#section-3.3
+     * @return string The URI path.
+     */
+    public function getPath(): string;
+
+    /**
+     * Retrieve the query string of the URI.
+     *
+     * If no query string is present, this method MUST return an empty string.
+     *
+     * The leading "?" character is not part of the query and MUST NOT be
+     * added.
+     *
+     * The value returned MUST be percent-encoded, but MUST NOT double-encode
+     * any characters. To determine what characters to encode, please refer to
+     * RFC 3986, Sections 2 and 3.4.
+     *
+     * As an example, if a value in a key/value pair of the query string should
+     * include an ampersand ("&") not intended as a delimiter between values,
+     * that value MUST be passed in encoded form (e.g., "%26") to the instance.
+     *
+     * @see https://tools.ietf.org/html/rfc3986#section-2
+     * @see https://tools.ietf.org/html/rfc3986#section-3.4
+     * @return string The URI query string.
+     */
+    public function getQuery(): string;
+
+    /**
+     * Retrieve the fragment component of the URI.
+     *
+     * If no fragment is present, this method MUST return an empty string.
+     *
+     * The leading "#" character is not part of the fragment and MUST NOT be
+     * added.
+     *
+     * The value returned MUST be percent-encoded, but MUST NOT double-encode
+     * any characters. To determine what characters to encode, please refer to
+     * RFC 3986, Sections 2 and 3.5.
+     *
+     * @see https://tools.ietf.org/html/rfc3986#section-2
+     * @see https://tools.ietf.org/html/rfc3986#section-3.5
+     * @return string The URI fragment.
+     */
+    public function getFragment(): string;
+
+    /**
+     * Return an instance with the specified scheme.
+     *
+     * This method MUST retain the state of the current instance, and return
+     * an instance that contains the specified scheme.
+     *
+     * Implementations MUST support the schemes "http" and "https" case
+     * insensitively, and MAY accommodate other schemes if required.
+     *
+     * An empty scheme is equivalent to removing the scheme.
+     *
+     * @param string $scheme The scheme to use with the new instance.
+     * @return static A new instance with the specified scheme.
+     * @throws \InvalidArgumentException for invalid or unsupported schemes.
+     */
+    public function withScheme(string $scheme): UriInterface;
+
+    /**
+     * Return an instance with the specified user information.
+     *
+     * This method MUST retain the state of the current instance, and return
+     * an instance that contains the specified user information.
+     *
+     * Password is optional, but the user information MUST include the
+     * user; an empty string for the user is equivalent to removing user
+     * information.
+     *
+     * @param string $user The user name to use for authority.
+     * @param null|string $password The password associated with $user.
+     * @return static A new instance with the specified user information.
+     */
+    public function withUserInfo(string $user, ?string $password = null): UriInterface;
+
+    /**
+     * Return an instance with the specified host.
+     *
+     * This method MUST retain the state of the current instance, and return
+     * an instance that contains the specified host.
+     *
+     * An empty host value is equivalent to removing the host.
+     *
+     * @param string $host The hostname to use with the new instance.
+     * @return static A new instance with the specified host.
+     * @throws \InvalidArgumentException for invalid hostnames.
+     */
+    public function withHost(string $host): UriInterface;
+
+    /**
+     * Return an instance with the specified port.
+     *
+     * This method MUST retain the state of the current instance, and return
+     * an instance that contains the specified port.
+     *
+     * Implementations MUST raise an exception for ports outside the
+     * established TCP and UDP port ranges.
+     *
+     * A null value provided for the port is equivalent to removing the port
+     * information.
+     *
+     * @param null|int $port The port to use with the new instance; a null value
+     *     removes the port information.
+     * @return static A new instance with the specified port.
+     * @throws \InvalidArgumentException for invalid ports.
+     */
+    public function withPort(?int $port): UriInterface;
+
+    /**
+     * Return an instance with the specified path.
+     *
+     * This method MUST retain the state of the current instance, and return
+     * an instance that contains the specified path.
+     *
+     * The path can either be empty or absolute (starting with a slash) or
+     * rootless (not starting with a slash). Implementations MUST support all
+     * three syntaxes.
+     *
+     * If the path is intended to be domain-relative rather than path relative then
+     * it must begin with a slash ("/"). Paths not starting with a slash ("/")
+     * are assumed to be relative to some base path known to the application or
+     * consumer.
+     *
+     * Users can provide both encoded and decoded path characters.
+     * Implementations ensure the correct encoding as outlined in getPath().
+     *
+     * @param string $path The path to use with the new instance.
+     * @return static A new instance with the specified path.
+     * @throws \InvalidArgumentException for invalid paths.
+     */
+    public function withPath(string $path): UriInterface;
+
+    /**
+     * Return an instance with the specified query string.
+     *
+     * This method MUST retain the state of the current instance, and return
+     * an instance that contains the specified query string.
+     *
+     * Users can provide both encoded and decoded query characters.
+     * Implementations ensure the correct encoding as outlined in getQuery().
+     *
+     * An empty query string value is equivalent to removing the query string.
+     *
+     * @param string $query The query string to use with the new instance.
+     * @return static A new instance with the specified query string.
+     * @throws \InvalidArgumentException for invalid query strings.
+     */
+    public function withQuery(string $query): UriInterface;
+
+    /**
+     * Return an instance with the specified URI fragment.
+     *
+     * This method MUST retain the state of the current instance, and return
+     * an instance that contains the specified URI fragment.
+     *
+     * Users can provide both encoded and decoded fragment characters.
+     * Implementations ensure the correct encoding as outlined in getFragment().
+     *
+     * An empty fragment value is equivalent to removing the fragment.
+     *
+     * @param string $fragment The fragment to use with the new instance.
+     * @return static A new instance with the specified fragment.
+     */
+    public function withFragment(string $fragment): UriInterface;
+
+    /**
+     * Return the string representation as a URI reference.
+     *
+     * Depending on which components of the URI are present, the resulting
+     * string is either a full URI or relative reference according to RFC 3986,
+     * Section 4.1. The method concatenates the various components of the URI,
+     * using the appropriate delimiters:
+     *
+     * - If a scheme is present, it MUST be suffixed by ":".
+     * - If an authority is present, it MUST be prefixed by "//".
+     * - The path can be concatenated without delimiters. But there are two
+     *   cases where the path has to be adjusted to make the URI reference
+     *   valid as PHP does not allow to throw an exception in __toString():
+     *     - If the path is rootless and an authority is present, the path MUST
+     *       be prefixed by "/".
+     *     - If the path is starting with more than one "/" and no authority is
+     *       present, the starting slashes MUST be reduced to one.
+     * - If a query is present, it MUST be prefixed by "?".
+     * - If a fragment is present, it MUST be prefixed by "#".
+     *
+     * @see http://tools.ietf.org/html/rfc3986#section-4.1
+     * @return string
+     */
+    public function __toString(): string;
+}