rector/e2e/parse-php7-code/rector.php

<?php

declare(strict_types=1);

use Rector\Config\RectorConfig;
use Rector\Set\ValueObject\SetList;

return static function (RectorConfig $rectorConfig): void {
    $rectorConfig->paths([__DIR__.'/src']);

    $rectorConfig->sets([SetList::PHP_53]);
};