Update dependency phpunit/phpunit to v11

Author: renovate[bot]

composer.json

@@ -21,7 +21,7 @@
         "roave/security-advisories": "dev-latest",
         "squizlabs/php_codesniffer": "^3.6",
         "phpmd/phpmd": "^2.14",
-        "phpunit/phpunit": "^9.6",
+        "phpunit/phpunit": "^11.0",
         "phpstan/phpstan": "^1.10",
         "phpstan/phpstan-phpunit": "^1.3",
         "phpstan/phpstan-strict-rules": "^1.5",