chore: Update PHPUnit version constraint in composer.json to support version 12.0

Author: tkaratug

composer.json

@@ -37,7 +37,7 @@
         "orchestra/testbench": "^8.0 || ^9.0",
         "pestphp/pest": "^2.0",
         "pestphp/pest-plugin-laravel": "^2.0",
-        "phpunit/phpunit": "^10.0 || ^11.0"
+        "phpunit/phpunit": "^10.0 || ^11.0 || ^12.0"
     },
     "autoload": {
         "psr-4": {