Allow for old php-cs-fixer version.

Author: hbgl

composer.json

@@ -18,7 +18,7 @@
     "require-dev": {
         "phpunit/phpunit": "^10.1.3||^9.5.0||^8.5.13||^7.5.20",
         "phpstan/phpstan": "^1.10||^0.12.100",
-        "friendsofphp/php-cs-fixer": "^3.16"
+        "friendsofphp/php-cs-fixer": "^3.16||^2.18"
     },
     "autoload": {
         "psr-4": {