feat: bump grumphp from v1 to v2

Author: Stefan Boonstra

composer.json

@@ -31,7 +31,7 @@
         "kint-php/kint": "@stable",
         "php-parallel-lint/php-parallel-lint": "^1.2",
         "phpmd/phpmd": "^2.15",
-        "phpro/grumphp-shim": "^1.13",
+        "phpro/grumphp-shim": "^2.12",
         "phpstan/phpstan": "@stable",
         "squizlabs/php_codesniffer": "^3.12.0",
         "youwe/composer-dependency-installer": "^1.4.0",