Fix tests for phpunit 12 (#528)

Author: lyrixx

composer.json

@@ -7,7 +7,7 @@
         "php": ">=7.3"
     },
     "require-dev": {
-        "phpunit/phpunit": "^10"
+        "phpunit/phpunit": "^12"
     },
     "autoload": {
         "psr-4": {