Update PHPUnit version to 12.x

Author: codedmonkey

composer.json

@@ -63,7 +63,7 @@
         "dama/doctrine-test-bundle": "^8.3",
         "friendsofphp/php-cs-fixer": "^3.75",
         "phpstan/phpstan": "^2.1",
-        "phpunit/phpunit": "^11.5",
+        "phpunit/phpunit": "^12.4",
         "symfony/browser-kit": "^7.3",
         "symfony/css-selector": "^7.3",
         "symfony/debug-bundle": "^7.3",