When disabling third-party deps, don't use Gravatar.

Fixes #2810

config/app.php

@@ -187,6 +187,7 @@ return [
         GrahamCampbell\Security\SecurityServiceProvider::class,
         Jenssegers\Date\DateServiceProvider::class,
         Laravel\Tinker\TinkerServiceProvider::class,
+        Laravolt\Avatar\ServiceProvider::class,
         McCool\LaravelAutoPresenter\AutoPresenterServiceProvider::class,
         PragmaRX\Google2FA\Vendor\Laravel\ServiceProvider::class,
         Roumen\Feed\FeedServiceProvider::class,