Restrict SEOPress CSS file for logged users

Hey there,

SEOPress outputs a CSS file wp-seopress/assets/css/seopress-admin-bar.min.css for logged users when used with MemberPress plugin.

I think we should restrict it for subscribers and should be available for administrators and editors.

It would easily possible with the conditional tag in WordPress

if ( current_user_can('administrator') ) {
        return;
    }