Update phpunit/phpunit requirement from ^10.2 to ^11.4 (#29)

Author: dependabot[bot]

composer.json

@@ -36,7 +36,7 @@
         "phpstan/phpstan-deprecation-rules": "^1.1",
         "phpstan/phpstan-phpunit": "^1.3",
         "phpstan/phpstan-strict-rules": "^1.5",
-        "phpunit/phpunit": "^10.2",
+        "phpunit/phpunit": "^10.2 || ^11.4",
         "rector/rector": "^1.0.0"
     },
     "conflict": {