Update php-qrcode and php-settings-container for PHP 8.1

By running the following command after updating composer.json

```
composer update chillerlan/php-qrcode chillerlan/php-settings-container
```

This change fixes a deprecation warning from Preferences ->
Personal data / Authentication -> Authenticator (OTP).

```
Return type of chillerlan\Settings\SettingsContainerAbstract::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
1. vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php(19): ttrss_error_handler(Return type of chillerlan\Settings\SettingsContainerAbstract::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice, vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php)
2. vendor/composer/ClassLoader.php(571): include(/usr/share/webapps/tt-rss/vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php)
3. vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile(/usr/share/webapps/tt-rss/vendor/composer/../chillerlan/php-settings-container/src/SettingsContainerAbstract.php)
4. vendor/chillerlan/php-qrcode/src/QROptions.php(59): loadClass(chillerlan\Settings\SettingsContainerAbstract)
5. vendor/composer/ClassLoader.php(571): include(/usr/share/webapps/tt-rss/vendor/chillerlan/php-qrcode/src/QROptions.php)
6. vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile(/usr/share/webapps/tt-rss/vendor/composer/../chillerlan/php-qrcode/src/QROptions.php)
7. vendor/chillerlan/php-qrcode/src/QRCode.php(113): loadClass(chillerlan\QRCode\QROptions)
8. classes/pref/prefs.php(958): __construct()
9. classes/pref/prefs.php(469): _get_otp_qrcode_img()
10. classes/pref/prefs.php(541): index_auth_2fa()
11. backend.php(136): index_auth()
```

The issue is fixed in php-settings-container 2.1.1 [1] Here I use the
latest php-qrcode version for another PHP 8.1 fix [2].

[1] https://github.com/chillerlan/php-settings-container/commit/68bc5019c8b38956c83906431ef879668366b036#diff-359c7f7a6d32d9935951e1b0742eb116fb654f4a932c8d40328bb5dcab2fa111L162
[2] https://github.com/chillerlan/php-qrcode/issues/97

2 files changed, 18 insertions, 59 deletions

diff --git a/vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php b/vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php
index 1ccc1a0e2..f643f73d0 100644
--- a/vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php
+++ b/vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php
@@ -2,9 +2,7 @@
 /**
  * Class SettingsContainerAbstract
  *
- * @filesource   SettingsContainerAbstract.php
  * @created      28.08.2018
- * @package      chillerlan\Settings
  * @author       Smiley <[email protected]>
  * @copyright    2018 Smiley
  * @license      MIT
@@ -12,16 +10,15 @@
 
 namespace chillerlan\Settings;
 
-use Exception, ReflectionClass, ReflectionProperty;
+use ReflectionClass, ReflectionProperty;
 
-use function call_user_func, call_user_func_array, get_object_vars, json_decode, json_encode, method_exists, property_exists;
+use function get_object_vars, json_decode, json_encode, method_exists, property_exists;
+use const JSON_THROW_ON_ERROR;
 
 abstract class SettingsContainerAbstract implements SettingsContainerInterface{
 
 	/**
 	 * SettingsContainerAbstract constructor.
-	 *
-	 * @param iterable|null $properties
 	 */
 	public function __construct(iterable $properties = null){
 
@@ -35,8 +32,6 @@ abstract class SettingsContainerAbstract implements SettingsContainerInterface{
 	/**
 	 * calls a method with trait name as replacement constructor for each used trait
 	 * (remember pre-php5 classname constructors? yeah, basically this.)
-	 *
-	 * @return void
 	 */
 	protected function construct():void{
 		$traits = (new ReflectionClass($this))->getTraits();
@@ -45,7 +40,7 @@ abstract class SettingsContainerAbstract implements SettingsContainerInterface{
 			$method = $trait->getShortName();
 
 			if(method_exists($this, $method)){
-				call_user_func([$this, $method]);
+				$this->{$method}();
 			}
 		}
 
@@ -56,16 +51,17 @@ abstract class SettingsContainerAbstract implements SettingsContainerInterface{
 	 */
 	public function __get(string $property){
 
-		if(property_exists($this, $property) && !$this->isPrivate($property)){
+		if(!property_exists($this, $property) || $this->isPrivate($property)){
+			return null;
+		}
 
-			if(method_exists($this, 'get_'.$property)){
-				return call_user_func([$this, 'get_'.$property]);
-			}
+		$method = 'get_'.$property;
 
-			return $this->{$property};
+		if(method_exists($this, $method)){
+			return $this->{$method}();
 		}
 
-		return null;
+		return $this->{$property};
 	}
 
 	/**
@@ -77,8 +73,10 @@ abstract class SettingsContainerAbstract implements SettingsContainerInterface{
 			return;
 		}
 
-		if(method_exists($this, 'set_'.$property)){
-			call_user_func_array([$this, 'set_'.$property], [$value]);
+		$method = 'set_'.$property;
+
+		if(method_exists($this, $method)){
+			$this->{$method}($value);
 
 			return;
 		}
@@ -95,10 +93,6 @@ abstract class SettingsContainerAbstract implements SettingsContainerInterface{
 
 	/**
 	 * @internal Checks if a property is private
-	 *
-	 * @param string $property
-	 *
-	 * @return bool
 	 */
 	protected function isPrivate(string $property):bool{
 		return (new ReflectionProperty($this, $property))->isPrivate();
@@ -152,12 +146,7 @@ abstract class SettingsContainerAbstract implements SettingsContainerInterface{
 	 * @inheritdoc
 	 */
 	public function fromJSON(string $json):SettingsContainerInterface{
-
-		$data = json_decode($json, true); // as of PHP 7.3: JSON_THROW_ON_ERROR
-
-		if($data === false || $data === null){
-			throw new Exception('error while decoding JSON');
-		}
+		$data = json_decode($json, true, 512, JSON_THROW_ON_ERROR);
 
 		return $this->fromIterable($data);
 	}
@@ -165,7 +154,7 @@ abstract class SettingsContainerAbstract implements SettingsContainerInterface{
 	/**
 	 * @inheritdoc
 	 */
-	public function jsonSerialize(){
+	public function jsonSerialize():array{
 		return $this->toArray();
 	}
 
diff --git a/vendor/chillerlan/php-settings-container/src/SettingsContainerInterface.php b/vendor/chillerlan/php-settings-container/src/SettingsContainerInterface.php
index 59cef6232..ddacccd29 100644
--- a/vendor/chillerlan/php-settings-container/src/SettingsContainerInterface.php
+++ b/vendor/chillerlan/php-settings-container/src/SettingsContainerInterface.php
@@ -2,9 +2,7 @@
 /**
  * Interface SettingsContainerInterface
  *
- * @filesource   SettingsContainerInterface.php
  * @created      28.08.2018
- * @package      chillerlan\Settings
  * @author       Smiley <[email protected]>
  * @copyright    2018 Smiley
  * @license      MIT
@@ -22,9 +20,7 @@ interface SettingsContainerInterface extends JsonSerializable{
 	/**
 	 * Retrieve the value of $property
 	 *
-	 * @param string $property
-	 *
-	 * @return mixed
+	 * @return mixed|null
 	 */
 	public function __get(string $property);
 
@@ -33,69 +29,43 @@ interface SettingsContainerInterface extends JsonSerializable{
 	 *
 	 * @param string $property
 	 * @param mixed  $value
-	 *
-	 * @return void
 	 */
 	public function __set(string $property, $value):void;
 
 	/**
 	 * Checks if $property is set (aka. not null), excluding private properties
-	 *
-	 * @param string $property
-	 *
-	 * @return bool
 	 */
 	public function __isset(string $property):bool;
 
 	/**
 	 * Unsets $property while avoiding private and non-existing properties
-	 *
-	 * @param string $property
-	 *
-	 * @return void
 	 */
 	public function __unset(string $property):void;
 
 	/**
 	 * @see SettingsContainerInterface::toJSON()
-	 *
-	 * @return string
 	 */
 	public function __toString():string;
 
 	/**
 	 * Returns an array representation of the settings object
-	 *
-	 * @return array
 	 */
 	public function toArray():array;
 
 	/**
 	 * Sets properties from a given iterable
-	 *
-	 * @param iterable $properties
-	 *
-	 * @return \chillerlan\Settings\SettingsContainerInterface
 	 */
 	public function fromIterable(iterable $properties):SettingsContainerInterface;
 
 	/**
 	 * Returns a JSON representation of the settings object
 	 * @see \json_encode()
-	 *
-	 * @param int|null $jsonOptions
-	 *
-	 * @return string
 	 */
 	public function toJSON(int $jsonOptions = null):string;
 
 	/**
 	 * Sets properties from a given JSON string
 	 *
-	 * @param string $json
-	 *
-	 * @return \chillerlan\Settings\SettingsContainerInterface
-	 *
 	 * @throws \Exception
 	 * @throws \JsonException
 	 */