Update phpstan/phpstan-phpunit requirement from ^1.0 to ^1.1

Author: github-actions[bot]

composer.json

@@ -86,7 +86,7 @@
         "phpstan/extension-installer": "^1.1",
         "phpstan/phpstan": "^1.0",
         "phpstan/phpstan-deprecation-rules": "^1.0",
-        "phpstan/phpstan-phpunit": "^1.0",
+        "phpstan/phpstan-phpunit": "^1.1",
         "phpstan/phpstan-strict-rules": "^1.0",
         "phpunit/phpunit": "^9.5.5",
         "rector/rector": "^0.14",