Issue with favoriter_model

[tariqmagdy]

i have two models related to users one for admin users User and other for customers Customer, I need to apply this package with Customer model, and i seed on your package use the auth.providers.users.model, but as you see i have to provider

'providers' => [ 'users' => [ 'driver' => 'eloquent', 'model' => App\Models\User::class, ], 'customers' => [ 'driver' => 'eloquent', 'model' => App\Models\Customer::class, ] ],

so I suggest to add on `config/favorite.php` 
`'favoriter_model' => App\Models\Customer::class,`
and use this instead of `auth.providers.users.model`

[overtrue]

Welcome to make a PR. Thanks.