Require PHP_CodeSniffer 4+

Author: horgh

composer.json

@@ -26,7 +26,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "3.*",
         "phpunit/phpunit": ">=8.0.0,<10.0.0",
-        "squizlabs/php_codesniffer": "3.* || 4.*",
+        "squizlabs/php_codesniffer": "4.*",
         "phpstan/phpstan": "*"
     },
     "autoload": {