Update PHP SDK to 2.2.0

- include testing for PHP 8.0 and 8.1
- includes various smaller changes

LICENSE.txt

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016-2020 viafintech GmbH
+Copyright (c) 2016-2024 viafintech GmbH
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

readme.md

@@ -1,11 +1,11 @@
-# Barzahlen Payment Module PHP SDK (v2.1.2)
+# viacash/Barzahlen Payment Module PHP SDK (v2.2.0)
 
 [![Build Status](https://travis-ci.org/Barzahlen/Barzahlen-PHP.svg?branch=master)](https://travis-ci.org/Barzahlen/Barzahlen-PHP)
 [![Total Downloads](https://poser.pugx.org/barzahlen/barzahlen-php/downloads)](https://packagist.org/packages/barzahlen/barzahlen-php)
 [![License](https://poser.pugx.org/barzahlen/barzahlen-php/license)](https://packagist.org/packages/barzahlen/barzahlen-php)
 
 ## Copyright
-(c) 2016-2021, viafintech GmbH  
+(c) 2016-2024, viafintech GmbH  
 https://www.viafintech.com
 
 ## Preparation
@@ -336,6 +336,6 @@ if ($webhook->verify($header, $body)) {
 ```
 
 ## Support
-The Barzahlen Team will happily assist you with any problems or questions.
+The viacash Team will happily assist you with any problems or questions.
 
-Send us an email to support@viafintech.com or use the contact form at https://integration.barzahlen.de/en/support.
+Send us an email to support@viafintech.com or check out our Solutions center at https://www.viafintech.com/overview-solutions/.

tests/ClientTest.php

@@ -16,7 +16,7 @@ class ClientTest extends \PHPUnit\Framework\TestCase
     /**
      * @var string
      */
-    private $userAgent = 'PHP SDK v2.1.2';
+    private $userAgent = 'PHP SDK v2.2.0';
 
     public function setUp()
     {
@@ -30,9 +30,9 @@ public function testDefaultUserAgent()
 
     public function testSetUserAgent()
     {
-        $this->client->setUserAgent('Shopsystem v2.1.2');
+        $this->client->setUserAgent('Shopsystem v2.2.0');
 
-        $this->assertAttributeEquals('Shopsystem v2.1.2', 'userAgent', $this->client);
+        $this->assertAttributeEquals('Shopsystem v2.2.0', 'userAgent', $this->client);
     }
 
     public function testBuildHeaderWithIdempotency()