How to return div with custom attributes(Coding a Gutenberg Block)

You could try returning JSX, skipping the el part:

return (
    <div
        className="review-widget"
        data-limit="10"
    >
    </div>
);

It may also be that you need to quote the 10 in your original el example.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)