bug #1343 Add more reserved keyword (antalaron)

This PR was merged into the 1.x-dev branch.

Discussion
----------

Add more reserved keyword

As of PHP 8.1 `fn`, `match` and `readonly` are also reserved keywords. Cannot make a class named after them.

Commits
-------

f54a9fd Add more reserved keyword

src/Validator.php

@@ -34,11 +34,11 @@ public static function validateClassName(string $className, string $errorMessage
             'clone', 'const', 'continue', 'declare', 'default', 'die', 'do',
             'echo', 'else', 'elseif', 'empty', 'enddeclare', 'endfor',
             'endforeach', 'endif', 'endswitch', 'endwhile', 'eval',
-            'exit', 'extends', 'final', 'finally', 'for', 'foreach', 'function',
+            'exit', 'extends', 'final', 'finally', 'fn', 'for', 'foreach', 'function',
             'global', 'goto', 'if', 'implements', 'include',
             'include_once', 'instanceof', 'insteadof', 'interface', 'isset',
-            'list', 'namespace', 'new', 'or', 'print', 'private',
-            'protected', 'public', 'require', 'require_once', 'return',
+            'list', 'match', 'namespace', 'new', 'or', 'print', 'private',
+            'protected', 'public', 'readonly', 'require', 'require_once', 'return',
             'static', 'switch', 'throw', 'trait', 'try', 'unset',
             'use', 'var', 'while', 'xor', 'yield',
             'int', 'float', 'bool', 'string', 'true', 'false', 'null', 'void',