Fix require-checker to specific version

It's the only version that supports PHP 8.2-8.5

Author: tvdijen

composer.json

@@ -25,7 +25,7 @@
         "ext-curl": "*",
 
         "icanhazstring/composer-unused": "^0.9",
-        "maglnet/composer-require-checker": "^4",
+        "maglnet/composer-require-checker": "^4.18.0",
         "phpstan/extension-installer": "^1.4",
         "phpstan/phpstan": "^2.1",
         "phpstan/phpstan-mockery": "^2.0",