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

Author: renovate[bot]

composer.json

@@ -25,7 +25,7 @@
         "phpstan/phpstan": "^1.12.15",
         "phpstan/phpstan-phpunit": "^1.4.2",
         "phpstan/phpstan-symfony": "^1.4.13",
-        "phpunit/phpunit": "^11.4",
+        "phpunit/phpunit": "^12.0",
         "psr/http-message": "^2.0",
         "riverline/multipart-parser": "^2.1",
         "slam/phpstan-extensions": "^6.5.0",