show only some relationship attributes

[dgillier]

Hello,

Thanks for this great package !

I tried to hide some of the relationship attributes by using your $gdprVisible property with just the fields I want visible, working ok for the User model but not for the relationships. (I tried to add some of the relationship attributes like 'bookings.name' in $gdprVisible, but it's not working)

Anyway to do that ? Thanks, Denis