Please add data sanitizing

Hello, I have downloaded your plugin to test it, it works perfectly in WordPress 4.7.2. I have noticed that you’re not sanitizing the user-entered search parameter $s though and would recommend that you add this in the next update as a security fix. intval($s) for integers and sanitize_text_field($s) would be sufficient. For your reference: https://developer.wordpress.org/plugins/security/securing-input/ Best regards