Allow PHPUnit 12

Author: dereuromark

composer.json

@@ -28,7 +28,7 @@
     },
     "require-dev": {
         "phpstan/phpstan": "^1.0.0",
-        "phpunit/phpunit": "^10.3 || ^11.2"
+        "phpunit/phpunit": "^10.3 || ^11.2 || ^12.0"
     },
     "autoload": {
         "psr-4": {