chore(deps): update dependency phpunit/phpunit to v12

Author: renovate[bot]

composer.json

@@ -31,7 +31,7 @@
         "phpstan/phpstan": "2.1.8",
         "phpstan/phpstan-phpunit": "2.0.4",
         "phpstan/phpstan-strict-rules": "2.0.4",
-        "phpunit/phpunit": "^11.0",
+        "phpunit/phpunit": "^12.0",
         "thecodingmachine/phpstan-safe-rule": "^1.0"
     },
     "autoload": {