Add PHP 7.4 and 8.0 support

.gitignore

@@ -1,5 +1,6 @@
 .idea
 .php_cs.cache
+.phpunit.result.cache
 composer.phar
 composer.lock
 php-cs-fixer.phar

composer.json

@@ -13,14 +13,15 @@
         }
     ],
     "require": {
-        "php": "^7.2",
-        "art4/json-api-client": "^0.10",
-        "cache/void-adapter": "^0.4",
+        "php": "^7.4 || ^8.0",
+        "art4/json-api-client": "^1.0",
+        "cache/filesystem-adapter": "^1.1",
+        "cache/void-adapter": "^1.1",
         "guzzlehttp/guzzle": "^6.0",
-        "youthweb/oauth2-youthweb": "^1.1"
+        "youthweb/oauth2-youthweb": "^1.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.0 || ^7.0"
+        "phpunit/phpunit": "^9"
     },
     "autoload": {
         "psr-4": {

phpunit.xml

@@ -1,27 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
-
-<phpunit backupGlobals="false"
-         backupStaticAttributes="false"
-         colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false"
-         stopOnError="false"
-         stopOnIncomplete="false"
-         stopOnSkipped="false"
-         bootstrap="vendor/autoload.php"
->
-    <testsuites>
-        <testsuite name="all">
-            <directory suffix="Test.php">tests/Integration/</directory>
-            <directory suffix="Test.php">tests/Unit/</directory>
-        </testsuite>
-    </testsuites>
-    <filter>
-        <whitelist>
-            <directory suffix=".php">src/</directory>
-        </whitelist>
-    </filter>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" backupStaticAttributes="false" colors="true" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false" stopOnError="false" stopOnIncomplete="false" stopOnSkipped="false" bootstrap="vendor/autoload.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage>
+    <include>
+      <directory suffix=".php">src/</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="all">
+      <directory suffix="Test.php">tests/Integration/</directory>
+      <directory suffix="Test.php">tests/Unit/</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>