Update to squizlabs/php_codesniffer v4 (#37)

Author: jnoordsij

composer.json

@@ -21,7 +21,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^9",
-        "squizlabs/php_codesniffer": "^3.5",
+        "squizlabs/php_codesniffer": "^4",
         "phpstan/phpstan": "^2"
     },
     "autoload": {