[TASK] Ensure compatibility with PHP 8.1

Author: jrenggli

composer.json

@@ -9,7 +9,7 @@
     "typo3/cms-core": "^11",
     "cloudinary/cloudinary_php": "^1.15",
     "ext-json": "*",
-    "php": ">=7.3.0"
+    "php": "^7.3 || ~8.0 || ~8.1"
   },
   "autoload": {
     "psr-4": {

ext_localconf.php

@@ -66,7 +66,7 @@
         ],
     ];
 
-    if (!is_array($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cloudinary'])) {
+    if (!isset($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cloudinary'])) {
         // cache configuration, see https://docs.typo3.org/typo3cms/CoreApiReference/ApiOverview/CachingFramework/Configuration/Index.html#cache-configurations
         $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cloudinary']['frontend'] = VariableFrontend::class;
         $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cloudinary']['groups'] = ['all', 'cloudinary'];