PHP 8.1 compatibility

[staabm]

I would love to use this small class in PHP 8.1 projects

➜  phpstan-phpstorm-error-identifiers git:(php81) php -v                                         
PHP 8.1.33 (cli) (built: Jul  1 2025 21:17:52) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.33, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.33, Copyright (c), by Zend Technologies
➜  phpstan-phpstorm-error-identifiers git:(php81) php -l src/CheckstyleErrorFormatterPhpStorm.php
No syntax errors detected in src/CheckstyleErrorFormatterPhpStorm.php

[NickSdot]

Thanks! Already tagged.