Run Rector

I used the following config:

<?php

declare(strict_types=1);

use Rector\Config\RectorConfig;
use Rector\Doctrine\Set\DoctrineSetList;

return function (RectorConfig $rectorConfig): void {
    $rectorConfig->paths([
        __DIR__ . '/tests',
    ]);
    $rectorConfig->sets([
        DoctrineSetList::ANNOTATIONS_TO_ATTRIBUTES,
    ]);
};