Versão 1.0
use Prettus\Repository\Eloquent\Repository;
class PostRepository extends Repository {
    public function __construct(Post $model)
    {
        parent::__construct($model);
    }   
    
}
Versão 2.0
use Prettus\Repository\Eloquent\BaseRepository;
class PostRepository extends BaseRepository {
    
    /**
     * Specify Model class name
     *
     * @return string
     */
    function model()
    {
        return "App\\Post";
    }
}