Update dependency phpunit/phpunit to v12

Author: renovate[bot]

composer.json

@@ -19,7 +19,7 @@
         "phpstan/phpdoc-parser": "^2.3",
         "phpstan/phpstan": "^2.1",
         "phpstan/phpstan-strict-rules": "^2.0",
-        "phpunit/phpunit": "^10.5",
+        "phpunit/phpunit": "^12.0",
         "rector/rector": "^2.1",
         "slevomat/coding-standard": "^8.20",
         "squizlabs/php_codesniffer": "^3.13",