PHP 8.4 | Tokens/Collections::$propertyModifierKeywords: allow for "abstract" modifier keyword

Author: jrfnl

PHPCSUtils/Tokens/Collections.php

@@ -478,6 +478,7 @@ final class Collections
         \T_VAR           => \T_VAR,
         \T_READONLY      => \T_READONLY,
         \T_FINAL         => \T_FINAL,
+        \T_ABSTRACT      => \T_ABSTRACT,
     ];
 
     /**