* add phpunit as a dev dependency

 * add some basic tests for UrlHelper::rewrite_relative()
 * fix UrlHelper::rewrite_relative() to work better on non-absolute
   relative URL paths

22 files changed, 1451 insertions, 0 deletions

diff --git a/vendor/sebastian/type/ChangeLog.md b/vendor/sebastian/type/ChangeLog.md
new file mode 100644
index 000000000..73837bde5
--- /dev/null
+++ b/vendor/sebastian/type/ChangeLog.md
@@ -0,0 +1,123 @@
+# ChangeLog
+
+All notable changes are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
+
+## [2.3.4] - 2021-06-15
+
+* Fixed regression introduced in 2.3.3
+
+## [2.3.3] - 2021-06-15 [YANKED]
+
+### Fixed
+
+* [#15](https://github.com/sebastianbergmann/type/issues/15): "false" pseudo type is not handled properly
+
+## [2.3.2] - 2021-06-04
+
+### Fixed
+
+* Fixed handling of tentatively declared return types
+
+## [2.3.1] - 2020-10-26
+
+### Fixed
+
+* `SebastianBergmann\Type\Exception` now correctly extends `\Throwable`
+
+## [2.3.0] - 2020-10-06
+
+### Added
+
+* [#14](https://github.com/sebastianbergmann/type/issues/14): Support for `static` return type that is introduced in PHP 8
+
+## [2.2.2] - 2020-09-28
+
+### Changed
+
+* Changed PHP version constraint in `composer.json` from `^7.3 || ^8.0` to `>=7.3`
+
+## [2.2.1] - 2020-07-05
+
+### Fixed
+
+* Fixed handling of `mixed` type in `ReflectionMapper::fromMethodReturnType()`
+
+## [2.2.0] - 2020-07-05
+
+### Added
+
+* Added `MixedType` object for representing PHP 8's `mixed` type
+
+## [2.1.1] - 2020-06-26
+
+### Added
+
+* This component is now supported on PHP 8
+
+## [2.1.0] - 2020-06-01
+
+### Added
+
+* Added `UnionType` object for representing PHP 8's Union Types
+* Added `ReflectionMapper::fromMethodReturnType()` for mapping `\ReflectionMethod::getReturnType()` to a `Type` object
+* Added `Type::name()` for retrieving the name of a type
+* Added `Type::asString()` for retrieving a textual representation of a type
+
+### Changed
+
+* Deprecated `Type::getReturnTypeDeclaration()` (use `Type::asString()` instead and prefix its result with `': '`)
+* Deprecated `TypeName::getNamespaceName()` (use `TypeName::namespaceName()` instead)
+* Deprecated `TypeName::getSimpleName()` (use `TypeName::simpleName()` instead)
+* Deprecated `TypeName::getQualifiedName()` (use `TypeName::qualifiedName()` instead)
+
+## [2.0.0] - 2020-02-07
+
+### Removed
+
+* This component is no longer supported on PHP 7.2
+
+## [1.1.3] - 2019-07-02
+
+### Fixed
+
+* Fixed class name comparison in `ObjectType` to be case-insensitive
+
+## [1.1.2] - 2019-06-19
+
+### Fixed
+
+* Fixed handling of `object` type
+
+## [1.1.1] - 2019-06-08
+
+### Fixed
+
+* Fixed autoloading of `callback_function.php` fixture file
+
+## [1.1.0] - 2019-06-07
+
+### Added
+
+* Added support for `callable` type
+* Added support for `iterable` type
+
+## [1.0.0] - 2019-06-06
+
+* Initial release based on [code contributed by Michel Hartmann to PHPUnit](https://github.com/sebastianbergmann/phpunit/pull/3673)
+
+[2.3.4]: https://github.com/sebastianbergmann/type/compare/ca39369c41313ed12c071ed38ecda8fcdb248859...2.3.4
+[2.3.3]: https://github.com/sebastianbergmann/type/compare/2.3.2...ca39369c41313ed12c071ed38ecda8fcdb248859
+[2.3.2]: https://github.com/sebastianbergmann/type/compare/2.3.1...2.3.2
+[2.3.1]: https://github.com/sebastianbergmann/type/compare/2.3.0...2.3.1
+[2.3.0]: https://github.com/sebastianbergmann/type/compare/2.2.2...2.3.0
+[2.2.2]: https://github.com/sebastianbergmann/type/compare/2.2.1...2.2.2
+[2.2.1]: https://github.com/sebastianbergmann/type/compare/2.2.0...2.2.1
+[2.2.0]: https://github.com/sebastianbergmann/type/compare/2.1.1...2.2.0
+[2.1.1]: https://github.com/sebastianbergmann/type/compare/2.1.0...2.1.1
+[2.1.0]: https://github.com/sebastianbergmann/type/compare/2.0.0...2.1.0
+[2.0.0]: https://github.com/sebastianbergmann/type/compare/1.1.3...2.0.0
+[1.1.3]: https://github.com/sebastianbergmann/type/compare/1.1.2...1.1.3
+[1.1.2]: https://github.com/sebastianbergmann/type/compare/1.1.1...1.1.2
+[1.1.1]: https://github.com/sebastianbergmann/type/compare/1.1.0...1.1.1
+[1.1.0]: https://github.com/sebastianbergmann/type/compare/1.0.0...1.1.0
+[1.0.0]: https://github.com/sebastianbergmann/type/compare/ff74aa41746bd8d10e931843ebf37d42da513ede...1.0.0
diff --git a/vendor/sebastian/type/LICENSE b/vendor/sebastian/type/LICENSE
new file mode 100644
index 000000000..b840591a9
--- /dev/null
+++ b/vendor/sebastian/type/LICENSE
@@ -0,0 +1,33 @@
+sebastian/type
+
+Copyright (c) 2019-2020, Sebastian Bergmann <[email protected]>.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+ * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in
+   the documentation and/or other materials provided with the
+   distribution.
+
+ * Neither the name of Sebastian Bergmann nor the names of his
+   contributors may be used to endorse or promote products derived
+   from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/sebastian/type/README.md b/vendor/sebastian/type/README.md
new file mode 100644
index 000000000..1036ce7a7
--- /dev/null
+++ b/vendor/sebastian/type/README.md
@@ -0,0 +1,20 @@
+# sebastian/type
+
+[![CI Status](https://github.com/sebastianbergmann/type/workflows/CI/badge.svg)](https://github.com/sebastianbergmann/type/actions)
+[![Type Coverage](https://shepherd.dev/github/sebastianbergmann/type/coverage.svg)](https://shepherd.dev/github/sebastianbergmann/type)
+
+Collection of value objects that represent the types of the PHP type system.
+
+## Installation
+
+You can add this library as a local, per-project dependency to your project using [Composer](https://getcomposer.org/):
+
+```
+composer require sebastian/type
+```
+
+If you only need this library during development, for instance to run your project's test suite, then you should add it as a development-time dependency:
+
+```
+composer require --dev sebastian/type
+```
diff --git a/vendor/sebastian/type/composer.json b/vendor/sebastian/type/composer.json
new file mode 100644
index 000000000..b02d8e92a
--- /dev/null
+++ b/vendor/sebastian/type/composer.json
@@ -0,0 +1,49 @@
+{
+    "name": "sebastian/type",
+    "description": "Collection of value objects that represent the types of the PHP type system",
+    "type": "library",
+    "homepage": "https://github.com/sebastianbergmann/type",
+    "license": "BSD-3-Clause",
+    "authors": [
+        {
+            "name": "Sebastian Bergmann",
+            "email": "[email protected]",
+            "role": "lead"
+        }
+    ],
+    "support": {
+        "issues": "https://github.com/sebastianbergmann/type/issues"
+    },
+    "prefer-stable": true,
+    "require": {
+        "php": ">=7.3"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^9.3"
+    },
+    "config": {
+        "platform": {
+            "php": "7.3.0"
+        },
+        "optimize-autoloader": true,
+        "sort-packages": true
+    },
+    "autoload": {
+        "classmap": [
+            "src/"
+        ]
+    },
+    "autoload-dev": {
+        "classmap": [
+            "tests/_fixture"
+        ],
+        "files": [
+            "tests/_fixture/callback_function.php"
+        ]
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.3-dev"
+        }
+    }
+}
diff --git a/vendor/sebastian/type/src/CallableType.php b/vendor/sebastian/type/src/CallableType.php
new file mode 100644
index 000000000..026762eaf
--- /dev/null
+++ b/vendor/sebastian/type/src/CallableType.php
@@ -0,0 +1,197 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use function assert;
+use function class_exists;
+use function count;
+use function explode;
+use function function_exists;
+use function is_array;
+use function is_object;
+use function is_string;
+use function strpos;
+use Closure;
+use ReflectionClass;
+use ReflectionException;
+use ReflectionObject;
+
+final class CallableType extends Type
+{
+    /**
+     * @var bool
+     */
+    private $allowsNull;
+
+    public function __construct(bool $nullable)
+    {
+        $this->allowsNull = $nullable;
+    }
+
+    /**
+     * @throws RuntimeException
+     */
+    public function isAssignable(Type $other): bool
+    {
+        if ($this->allowsNull && $other instanceof NullType) {
+            return true;
+        }
+
+        if ($other instanceof self) {
+            return true;
+        }
+
+        if ($other instanceof ObjectType) {
+            if ($this->isClosure($other)) {
+                return true;
+            }
+
+            if ($this->hasInvokeMethod($other)) {
+                return true;
+            }
+        }
+
+        if ($other instanceof SimpleType) {
+            if ($this->isFunction($other)) {
+                return true;
+            }
+
+            if ($this->isClassCallback($other)) {
+                return true;
+            }
+
+            if ($this->isObjectCallback($other)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function name(): string
+    {
+        return 'callable';
+    }
+
+    public function allowsNull(): bool
+    {
+        return $this->allowsNull;
+    }
+
+    private function isClosure(ObjectType $type): bool
+    {
+        return !$type->className()->isNamespaced() && $type->className()->simpleName() === Closure::class;
+    }
+
+    /**
+     * @throws RuntimeException
+     */
+    private function hasInvokeMethod(ObjectType $type): bool
+    {
+        $className = $type->className()->qualifiedName();
+        assert(class_exists($className));
+
+        try {
+            $class = new ReflectionClass($className);
+            // @codeCoverageIgnoreStart
+        } catch (ReflectionException $e) {
+            throw new RuntimeException(
+                $e->getMessage(),
+                (int) $e->getCode(),
+                $e
+            );
+            // @codeCoverageIgnoreEnd
+        }
+
+        if ($class->hasMethod('__invoke')) {
+            return true;
+        }
+
+        return false;
+    }
+
+    private function isFunction(SimpleType $type): bool
+    {
+        if (!is_string($type->value())) {
+            return false;
+        }
+
+        return function_exists($type->value());
+    }
+
+    private function isObjectCallback(SimpleType $type): bool
+    {
+        if (!is_array($type->value())) {
+            return false;
+        }
+
+        if (count($type->value()) !== 2) {
+            return false;
+        }
+
+        if (!is_object($type->value()[0]) || !is_string($type->value()[1])) {
+            return false;
+        }
+
+        [$object, $methodName] = $type->value();
+
+        return (new ReflectionObject($object))->hasMethod($methodName);
+    }
+
+    private function isClassCallback(SimpleType $type): bool
+    {
+        if (!is_string($type->value()) && !is_array($type->value())) {
+            return false;
+        }
+
+        if (is_string($type->value())) {
+            if (strpos($type->value(), '::') === false) {
+                return false;
+            }
+
+            [$className, $methodName] = explode('::', $type->value());
+        }
+
+        if (is_array($type->value())) {
+            if (count($type->value()) !== 2) {
+                return false;
+            }
+
+            if (!is_string($type->value()[0]) || !is_string($type->value()[1])) {
+                return false;
+            }
+
+            [$className, $methodName] = $type->value();
+        }
+
+        assert(isset($className) && is_string($className) && class_exists($className));
+        assert(isset($methodName) && is_string($methodName));
+
+        try {
+            $class = new ReflectionClass($className);
+
+            if ($class->hasMethod($methodName)) {
+                $method = $class->getMethod($methodName);
+
+                return $method->isPublic() && $method->isStatic();
+            }
+            // @codeCoverageIgnoreStart
+        } catch (ReflectionException $e) {
+            throw new RuntimeException(
+                $e->getMessage(),
+                (int) $e->getCode(),
+                $e
+            );
+            // @codeCoverageIgnoreEnd
+        }
+
+        return false;
+    }
+}
diff --git a/vendor/sebastian/type/src/FalseType.php b/vendor/sebastian/type/src/FalseType.php
new file mode 100644
index 000000000..425f363c0
--- /dev/null
+++ b/vendor/sebastian/type/src/FalseType.php
@@ -0,0 +1,46 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+final class FalseType extends Type
+{
+    public function isAssignable(Type $other): bool
+    {
+        if ($other instanceof self) {
+            return true;
+        }
+
+        return $other instanceof SimpleType &&
+              $other->name() === 'bool' &&
+              $other->value() === false;
+    }
+
+    public function name(): string
+    {
+        return 'false';
+    }
+
+    public function allowsNull(): bool
+    {
+        return false;
+    }
+
+    /**
+     * @deprecated
+     *
+     * @codeCoverageIgnore
+     *
+     * @throws LogicException
+     */
+    public function getReturnTypeDeclaration(): string
+    {
+        throw new LogicException;
+    }
+}
diff --git a/vendor/sebastian/type/src/GenericObjectType.php b/vendor/sebastian/type/src/GenericObjectType.php
new file mode 100644
index 000000000..6871008bd
--- /dev/null
+++ b/vendor/sebastian/type/src/GenericObjectType.php
@@ -0,0 +1,46 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+final class GenericObjectType extends Type
+{
+    /**
+     * @var bool
+     */
+    private $allowsNull;
+
+    public function __construct(bool $nullable)
+    {
+        $this->allowsNull = $nullable;
+    }
+
+    public function isAssignable(Type $other): bool
+    {
+        if ($this->allowsNull && $other instanceof NullType) {
+            return true;
+        }
+
+        if (!$other instanceof ObjectType) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public function name(): string
+    {
+        return 'object';
+    }
+
+    public function allowsNull(): bool
+    {
+        return $this->allowsNull;
+    }
+}
diff --git a/vendor/sebastian/type/src/IterableType.php b/vendor/sebastian/type/src/IterableType.php
new file mode 100644
index 000000000..c5bc6627b
--- /dev/null
+++ b/vendor/sebastian/type/src/IterableType.php
@@ -0,0 +1,76 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use function assert;
+use function class_exists;
+use function is_iterable;
+use ReflectionClass;
+use ReflectionException;
+
+final class IterableType extends Type
+{
+    /**
+     * @var bool
+     */
+    private $allowsNull;
+
+    public function __construct(bool $nullable)
+    {
+        $this->allowsNull = $nullable;
+    }
+
+    /**
+     * @throws RuntimeException
+     */
+    public function isAssignable(Type $other): bool
+    {
+        if ($this->allowsNull && $other instanceof NullType) {
+            return true;
+        }
+
+        if ($other instanceof self) {
+            return true;
+        }
+
+        if ($other instanceof SimpleType) {
+            return is_iterable($other->value());
+        }
+
+        if ($other instanceof ObjectType) {
+            $className = $other->className()->qualifiedName();
+            assert(class_exists($className));
+
+            try {
+                return (new ReflectionClass($className))->isIterable();
+                // @codeCoverageIgnoreStart
+            } catch (ReflectionException $e) {
+                throw new RuntimeException(
+                    $e->getMessage(),
+                    (int) $e->getCode(),
+                    $e
+                );
+                // @codeCoverageIgnoreEnd
+            }
+        }
+
+        return false;
+    }
+
+    public function name(): string
+    {
+        return 'iterable';
+    }
+
+    public function allowsNull(): bool
+    {
+        return $this->allowsNull;
+    }
+}
diff --git a/vendor/sebastian/type/src/MixedType.php b/vendor/sebastian/type/src/MixedType.php
new file mode 100644
index 000000000..7ad9191da
--- /dev/null
+++ b/vendor/sebastian/type/src/MixedType.php
@@ -0,0 +1,33 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+final class MixedType extends Type
+{
+    public function isAssignable(Type $other): bool
+    {
+        return !$other instanceof VoidType;
+    }
+
+    public function asString(): string
+    {
+        return 'mixed';
+    }
+
+    public function name(): string
+    {
+        return 'mixed';
+    }
+
+    public function allowsNull(): bool
+    {
+        return true;
+    }
+}
diff --git a/vendor/sebastian/type/src/NullType.php b/vendor/sebastian/type/src/NullType.php
new file mode 100644
index 000000000..8481fceb8
--- /dev/null
+++ b/vendor/sebastian/type/src/NullType.php
@@ -0,0 +1,43 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+final class NullType extends Type
+{
+    public function isAssignable(Type $other): bool
+    {
+        return !($other instanceof VoidType);
+    }
+
+    public function name(): string
+    {
+        return 'null';
+    }
+
+    public function asString(): string
+    {
+        return 'null';
+    }
+
+    /**
+     * @deprecated
+     *
+     * @codeCoverageIgnore
+     */
+    public function getReturnTypeDeclaration(): string
+    {
+        return '';
+    }
+
+    public function allowsNull(): bool
+    {
+        return true;
+    }
+}
diff --git a/vendor/sebastian/type/src/ObjectType.php b/vendor/sebastian/type/src/ObjectType.php
new file mode 100644
index 000000000..c71273cb4
--- /dev/null
+++ b/vendor/sebastian/type/src/ObjectType.php
@@ -0,0 +1,66 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use function is_subclass_of;
+use function strcasecmp;
+
+final class ObjectType extends Type
+{
+    /**
+     * @var TypeName
+     */
+    private $className;
+
+    /**
+     * @var bool
+     */
+    private $allowsNull;
+
+    public function __construct(TypeName $className, bool $allowsNull)
+    {
+        $this->className  = $className;
+        $this->allowsNull = $allowsNull;
+    }
+
+    public function isAssignable(Type $other): bool
+    {
+        if ($this->allowsNull && $other instanceof NullType) {
+            return true;
+        }
+
+        if ($other instanceof self) {
+            if (0 === strcasecmp($this->className->qualifiedName(), $other->className->qualifiedName())) {
+                return true;
+            }
+
+            if (is_subclass_of($other->className->qualifiedName(), $this->className->qualifiedName(), true)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function name(): string
+    {
+        return $this->className->qualifiedName();
+    }
+
+    public function allowsNull(): bool
+    {
+        return $this->allowsNull;
+    }
+
+    public function className(): TypeName
+    {
+        return $this->className;
+    }
+}
diff --git a/vendor/sebastian/type/src/ReflectionMapper.php b/vendor/sebastian/type/src/ReflectionMapper.php
new file mode 100644
index 000000000..db9baf425
--- /dev/null
+++ b/vendor/sebastian/type/src/ReflectionMapper.php
@@ -0,0 +1,123 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use function assert;
+use function sprintf;
+use ReflectionMethod;
+use ReflectionNamedType;
+use ReflectionType;
+use ReflectionUnionType;
+
+final class ReflectionMapper
+{
+    public function fromMethodReturnType(ReflectionMethod $method): Type
+    {
+        if (!$this->reflectionMethodHasReturnType($method)) {
+            return new UnknownType;
+        }
+
+        $returnType = $this->reflectionMethodGetReturnType($method);
+
+        assert($returnType instanceof ReflectionNamedType || $returnType instanceof ReflectionUnionType);
+
+        if ($returnType instanceof ReflectionNamedType) {
+            if ($returnType->getName() === 'self') {
+                return ObjectType::fromName(
+                    $method->getDeclaringClass()->getName(),
+                    $returnType->allowsNull()
+                );
+            }
+
+            if ($returnType->getName() === 'static') {
+                return new StaticType(
+                    TypeName::fromReflection($method->getDeclaringClass()),
+                    $returnType->allowsNull()
+                );
+            }
+
+            if ($returnType->getName() === 'mixed') {
+                return new MixedType;
+            }
+
+            if ($returnType->getName() === 'parent') {
+                $parentClass = $method->getDeclaringClass()->getParentClass();
+
+                // @codeCoverageIgnoreStart
+                if ($parentClass === false) {
+                    throw new RuntimeException(
+                        sprintf(
+                            '%s::%s() has a "parent" return type declaration but %s does not have a parent class',
+                            $method->getDeclaringClass()->getName(),
+                            $method->getName(),
+                            $method->getDeclaringClass()->getName()
+                        )
+                    );
+                }
+                // @codeCoverageIgnoreEnd
+
+                return ObjectType::fromName(
+                    $parentClass->getName(),
+                    $returnType->allowsNull()
+                );
+            }
+
+            return Type::fromName(
+                $returnType->getName(),
+                $returnType->allowsNull()
+            );
+        }
+
+        assert($returnType instanceof ReflectionUnionType);
+
+        $types = [];
+
+        foreach ($returnType->getTypes() as $type) {
+            assert($type instanceof ReflectionNamedType);
+
+            if ($type->getName() === 'self') {
+                $types[] = ObjectType::fromName(
+                    $method->getDeclaringClass()->getName(),
+                    false
+                );
+            } else {
+                $types[] = Type::fromName($type->getName(), false);
+            }
+        }
+
+        return new UnionType(...$types);
+    }
+
+    private function reflectionMethodHasReturnType(ReflectionMethod $method): bool
+    {
+        if ($method->hasReturnType()) {
+            return true;
+        }
+
+        if (!method_exists($method, 'hasTentativeReturnType')) {
+            return false;
+        }
+
+        return $method->hasTentativeReturnType();
+    }
+
+    private function reflectionMethodGetReturnType(ReflectionMethod $method): ?ReflectionType
+    {
+        if ($method->hasReturnType()) {
+            return $method->getReturnType();
+        }
+
+        if (!method_exists($method, 'getTentativeReturnType')) {
+            return null;
+        }
+
+        return $method->getTentativeReturnType();
+    }
+}
diff --git a/vendor/sebastian/type/src/SimpleType.php b/vendor/sebastian/type/src/SimpleType.php
new file mode 100644
index 000000000..8bf0bf7df
--- /dev/null
+++ b/vendor/sebastian/type/src/SimpleType.php
@@ -0,0 +1,92 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use function strtolower;
+
+final class SimpleType extends Type
+{
+    /**
+     * @var string
+     */
+    private $name;
+
+    /**
+     * @var bool
+     */
+    private $allowsNull;
+
+    /**
+     * @var mixed
+     */
+    private $value;
+
+    public function __construct(string $name, bool $nullable, $value = null)
+    {
+        $this->name       = $this->normalize($name);
+        $this->allowsNull = $nullable;
+        $this->value      = $value;
+    }
+
+    public function isAssignable(Type $other): bool
+    {
+        if ($this->allowsNull && $other instanceof NullType) {
+            return true;
+        }
+
+        if ($this->name === 'bool' && $other->name() === 'false') {
+            return true;
+        }
+
+        if ($other instanceof self) {
+            return $this->name === $other->name;
+        }
+
+        return false;
+    }
+
+    public function name(): string
+    {
+        return $this->name;
+    }
+
+    public function allowsNull(): bool
+    {
+        return $this->allowsNull;
+    }
+
+    public function value()
+    {
+        return $this->value;
+    }
+
+    private function normalize(string $name): string
+    {
+        $name = strtolower($name);
+
+        switch ($name) {
+            case 'boolean':
+                return 'bool';
+
+            case 'real':
+            case 'double':
+                return 'float';
+
+            case 'integer':
+                return 'int';
+
+            case '[]':
+                return 'array';
+
+            default:
+                return $name;
+        }
+    }
+}
diff --git a/vendor/sebastian/type/src/StaticType.php b/vendor/sebastian/type/src/StaticType.php
new file mode 100644
index 000000000..6833094d1
--- /dev/null
+++ b/vendor/sebastian/type/src/StaticType.php
@@ -0,0 +1,60 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+final class StaticType extends Type
+{
+    /**
+     * @var TypeName
+     */
+    private $className;
+
+    /**
+     * @var bool
+     */
+    private $allowsNull;
+
+    public function __construct(TypeName $className, bool $allowsNull)
+    {
+        $this->className  = $className;
+        $this->allowsNull = $allowsNull;
+    }
+
+    public function isAssignable(Type $other): bool
+    {
+        if ($this->allowsNull && $other instanceof NullType) {
+            return true;
+        }
+
+        if (!$other instanceof ObjectType) {
+            return false;
+        }
+
+        if (0 === strcasecmp($this->className->qualifiedName(), $other->className()->qualifiedName())) {
+            return true;
+        }
+
+        if (is_subclass_of($other->className()->qualifiedName(), $this->className->qualifiedName(), true)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    public function name(): string
+    {
+        return 'static';
+    }
+
+    public function allowsNull(): bool
+    {
+        return $this->allowsNull;
+    }
+}
diff --git a/vendor/sebastian/type/src/Type.php b/vendor/sebastian/type/src/Type.php
new file mode 100644
index 000000000..679223d96
--- /dev/null
+++ b/vendor/sebastian/type/src/Type.php
@@ -0,0 +1,101 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use function get_class;
+use function gettype;
+use function strtolower;
+
+abstract class Type
+{
+    public static function fromValue($value, bool $allowsNull): self
+    {
+        if ($value === false) {
+            return new FalseType;
+        }
+
+        $typeName = gettype($value);
+
+        if ($typeName === 'object') {
+            return new ObjectType(TypeName::fromQualifiedName(get_class($value)), $allowsNull);
+        }
+
+        $type = self::fromName($typeName, $allowsNull);
+
+        if ($type instanceof SimpleType) {
+            $type = new SimpleType($typeName, $allowsNull, $value);
+        }
+
+        return $type;
+    }
+
+    public static function fromName(string $typeName, bool $allowsNull): self
+    {
+        switch (strtolower($typeName)) {
+            case 'callable':
+                return new CallableType($allowsNull);
+
+            case 'false':
+                return new FalseType;
+
+            case 'iterable':
+                return new IterableType($allowsNull);
+
+            case 'null':
+                return new NullType;
+
+            case 'object':
+                return new GenericObjectType($allowsNull);
+
+            case 'unknown type':
+                return new UnknownType;
+
+            case 'void':
+                return new VoidType;
+
+            case 'array':
+            case 'bool':
+            case 'boolean':
+            case 'double':
+            case 'float':
+            case 'int':
+            case 'integer':
+            case 'real':
+            case 'resource':
+            case 'resource (closed)':
+            case 'string':
+                return new SimpleType($typeName, $allowsNull);
+
+            default:
+                return new ObjectType(TypeName::fromQualifiedName($typeName), $allowsNull);
+        }
+    }
+
+    public function asString(): string
+    {
+        return ($this->allowsNull() ? '?' : '') . $this->name();
+    }
+
+    /**
+     * @deprecated
+     *
+     * @codeCoverageIgnore
+     */
+    public function getReturnTypeDeclaration(): string
+    {
+        return ': ' . $this->asString();
+    }
+
+    abstract public function isAssignable(Type $other): bool;
+
+    abstract public function name(): string;
+
+    abstract public function allowsNull(): bool;
+}
diff --git a/vendor/sebastian/type/src/TypeName.php b/vendor/sebastian/type/src/TypeName.php
new file mode 100644
index 000000000..b076e89e0
--- /dev/null
+++ b/vendor/sebastian/type/src/TypeName.php
@@ -0,0 +1,113 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use function array_pop;
+use function explode;
+use function implode;
+use function substr;
+use ReflectionClass;
+
+final class TypeName
+{
+    /**
+     * @var ?string
+     */
+    private $namespaceName;
+
+    /**
+     * @var string
+     */
+    private $simpleName;
+
+    public static function fromQualifiedName(string $fullClassName): self
+    {
+        if ($fullClassName[0] === '\\') {
+            $fullClassName = substr($fullClassName, 1);
+        }
+
+        $classNameParts = explode('\\', $fullClassName);
+
+        $simpleName    = array_pop($classNameParts);
+        $namespaceName = implode('\\', $classNameParts);
+
+        return new self($namespaceName, $simpleName);
+    }
+
+    public static function fromReflection(ReflectionClass $type): self
+    {
+        return new self(
+            $type->getNamespaceName(),
+            $type->getShortName()
+        );
+    }
+
+    public function __construct(?string $namespaceName, string $simpleName)
+    {
+        if ($namespaceName === '') {
+            $namespaceName = null;
+        }
+
+        $this->namespaceName = $namespaceName;
+        $this->simpleName    = $simpleName;
+    }
+
+    public function namespaceName(): ?string
+    {
+        return $this->namespaceName;
+    }
+
+    public function simpleName(): string
+    {
+        return $this->simpleName;
+    }
+
+    public function qualifiedName(): string
+    {
+        return $this->namespaceName === null
+             ? $this->simpleName
+             : $this->namespaceName . '\\' . $this->simpleName;
+    }
+
+    /**
+     * @deprecated Use namespaceName() instead
+     *
+     * @codeCoverageIgnore
+     */
+    public function getNamespaceName(): ?string
+    {
+        return $this->namespaceName();
+    }
+
+    /**
+     * @deprecated Use simpleName() instead
+     *
+     * @codeCoverageIgnore
+     */
+    public function getSimpleName(): string
+    {
+        return $this->simpleName();
+    }
+
+    /**
+     * @deprecated Use qualifiedName() instead
+     *
+     * @codeCoverageIgnore
+     */
+    public function getQualifiedName(): string
+    {
+        return $this->qualifiedName();
+    }
+
+    public function isNamespaced(): bool
+    {
+        return $this->namespaceName !== null;
+    }
+}
diff --git a/vendor/sebastian/type/src/UnionType.php b/vendor/sebastian/type/src/UnionType.php
new file mode 100644
index 000000000..10c4a49b5
--- /dev/null
+++ b/vendor/sebastian/type/src/UnionType.php
@@ -0,0 +1,115 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use function count;
+use function implode;
+use function sort;
+
+final class UnionType extends Type
+{
+    /**
+     * @psalm-var list<Type>
+     */
+    private $types;
+
+    /**
+     * @throws RuntimeException
+     */
+    public function __construct(Type ...$types)
+    {
+        $this->ensureMinimumOfTwoTypes(...$types);
+        $this->ensureOnlyValidTypes(...$types);
+
+        $this->types = $types;
+    }
+
+    public function isAssignable(Type $other): bool
+    {
+        foreach ($this->types as $type) {
+            if ($type->isAssignable($other)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function asString(): string
+    {
+        return $this->name();
+    }
+
+    /**
+     * @deprecated
+     *
+     * @codeCoverageIgnore
+     */
+    public function getReturnTypeDeclaration(): string
+    {
+        return ': ' . $this->name();
+    }
+
+    public function name(): string
+    {
+        $types = [];
+
+        foreach ($this->types as $type) {
+            $types[] = $type->name();
+        }
+
+        sort($types);
+
+        return implode('|', $types);
+    }
+
+    public function allowsNull(): bool
+    {
+        foreach ($this->types as $type) {
+            if ($type instanceof NullType) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * @throws RuntimeException
+     */
+    private function ensureMinimumOfTwoTypes(Type ...$types): void
+    {
+        if (count($types) < 2) {
+            throw new RuntimeException(
+                'A union type must be composed of at least two types'
+            );
+        }
+    }
+
+    /**
+     * @throws RuntimeException
+     */
+    private function ensureOnlyValidTypes(Type ...$types): void
+    {
+        foreach ($types as $type) {
+            if ($type instanceof UnknownType) {
+                throw new RuntimeException(
+                    'A union type must not be composed of an unknown type'
+                );
+            }
+
+            if ($type instanceof VoidType) {
+                throw new RuntimeException(
+                    'A union type must not be composed of a void type'
+                );
+            }
+        }
+    }
+}
diff --git a/vendor/sebastian/type/src/UnknownType.php b/vendor/sebastian/type/src/UnknownType.php
new file mode 100644
index 000000000..dde4c6788
--- /dev/null
+++ b/vendor/sebastian/type/src/UnknownType.php
@@ -0,0 +1,43 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+final class UnknownType extends Type
+{
+    public function isAssignable(Type $other): bool
+    {
+        return true;
+    }
+
+    public function name(): string
+    {
+        return 'unknown type';
+    }
+
+    public function asString(): string
+    {
+        return '';
+    }
+
+    /**
+     * @deprecated
+     *
+     * @codeCoverageIgnore
+     */
+    public function getReturnTypeDeclaration(): string
+    {
+        return '';
+    }
+
+    public function allowsNull(): bool
+    {
+        return true;
+    }
+}
diff --git a/vendor/sebastian/type/src/VoidType.php b/vendor/sebastian/type/src/VoidType.php
new file mode 100644
index 000000000..18c017564
--- /dev/null
+++ b/vendor/sebastian/type/src/VoidType.php
@@ -0,0 +1,28 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+final class VoidType extends Type
+{
+    public function isAssignable(Type $other): bool
+    {
+        return $other instanceof self;
+    }
+
+    public function name(): string
+    {
+        return 'void';
+    }
+
+    public function allowsNull(): bool
+    {
+        return false;
+    }
+}
diff --git a/vendor/sebastian/type/src/exception/Exception.php b/vendor/sebastian/type/src/exception/Exception.php
new file mode 100644
index 000000000..e0e7ee579
--- /dev/null
+++ b/vendor/sebastian/type/src/exception/Exception.php
@@ -0,0 +1,16 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+use Throwable;
+
+interface Exception extends Throwable
+{
+}
diff --git a/vendor/sebastian/type/src/exception/LogicException.php b/vendor/sebastian/type/src/exception/LogicException.php
new file mode 100644
index 000000000..243582166
--- /dev/null
+++ b/vendor/sebastian/type/src/exception/LogicException.php
@@ -0,0 +1,14 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+final class LogicException extends \LogicException implements Exception
+{
+}
diff --git a/vendor/sebastian/type/src/exception/RuntimeException.php b/vendor/sebastian/type/src/exception/RuntimeException.php
new file mode 100644
index 000000000..4dfea6a6a
--- /dev/null
+++ b/vendor/sebastian/type/src/exception/RuntimeException.php
@@ -0,0 +1,14 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/type.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Type;
+
+final class RuntimeException extends \RuntimeException implements Exception
+{
+}