-function run()
+function run(...$args)
 {
-    $args = \func_get_args();
 }

Configure your rector.php:

<?php

use Rector\CodingStyle\Rector\ClassMethod\FuncGetArgsToVariadicParamRector;
use Rector\Config\RectorConfig;

return RectorConfig::configure()
    ->withRules([
        FuncGetArgsToVariadicParamRector::class,
    ]);

SETS:  Code Quality Coding Style