Magento 2.1.3 Make Customer Attribute - registration.php

registration.php

<?php
/**
 * @author     Sashas IT Support <[email protected]>
 * @copyright  2017  Sashas IT Support Inc. (http://www.extensions.sashas.org)
 * @license     http://opensource.org/licenses/GPL-3.0  GNU General Public License, version 3 (GPL-3.0)
 */

\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Sashas_CustomerAttribute',
    __DIR__
);