Pass notification instance to routeNotificationFor call

[klaasgeldof]

You can pass the notification instance to the routeNotificationFor call, so you can do this in your User model:

public function routeNotificationForMessagebird(Notification $notification)
{
    //
}

Previously, null was always passed to this method.

There was also a deprecation warning from PHP about the creation of dynamic properties.

[klaasgeldof]

Can someone have a look at this? It's a really simple PR. Thanks!

[ufukseyithan]

I'm surprised this has still not been merged.