App breaks when using DB translation loaders in tests

[LucaPuddu]

Whenever a translation is used in the service provider, an app that loads translations from the DB (e.g. using spatie/laravel-translation-loader) will break, cause the database hasn't been migrated yet when the app is bootstrapped.

Steps:

1. install both packages without migrating the db
2. add a /test route:

   Route::get('test', function () {
       return 'hello';
   });
   

3. go to /test

   Illuminate\Database\QueryException
   SQLSTATE[42S02]: Base table or view not found: 1146 Table 'homestead.language_lines' doesn't exist (SQL: select * from `language_lines` where `group` = *) 
   

Normally this is not an issue, because you should have the language_lines table in the db, but it totally breaks testing.