Standardised facade usage to use via their FQCN

Done via Laravel Shift Workbench

tests/Auth/AuthTest.php

@@ -7,7 +7,7 @@ use BookStack\Auth\User;
 use BookStack\Entities\Models\Page;
 use BookStack\Notifications\ConfirmEmail;
 use BookStack\Notifications\ResetPassword;
-use DB;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Notification;
 use Tests\TestCase;
 use Tests\TestResponse;

tests/Auth/SocialAuthTest.php

@@ -5,7 +5,7 @@ namespace Tests\Auth;
 use BookStack\Actions\ActivityType;
 use BookStack\Auth\SocialAccount;
 use BookStack\Auth\User;
-use DB;
+use Illuminate\Support\Facades\DB;
 use Laravel\Socialite\Contracts\Factory;
 use Laravel\Socialite\Contracts\Provider;
 use Mockery;

tests/Auth/UserInviteTest.php

@@ -6,9 +6,9 @@ use BookStack\Auth\Access\UserInviteService;
 use BookStack\Auth\User;
 use BookStack\Notifications\UserInvite;
 use Carbon\Carbon;
-use DB;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Str;
-use Notification;
+use Illuminate\Support\Facades\Notification;
 use Tests\TestCase;
 
 class UserInviteTest extends TestCase

tests/PublicActionTest.php

@@ -2,7 +2,7 @@
 
 namespace Tests;
 
-use Auth;
+use Illuminate\Support\Facades\Auth;
 use BookStack\Auth\Permissions\PermissionService;
 use BookStack\Auth\Permissions\RolePermission;
 use BookStack\Auth\Role;

tests/RecycleBinTest.php

@@ -8,7 +8,7 @@ use BookStack\Entities\Models\Chapter;
 use BookStack\Entities\Models\Deletion;
 use BookStack\Entities\Models\Entity;
 use BookStack\Entities\Models\Page;
-use DB;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Carbon;
 
 class RecycleBinTest extends TestCase

tests/ThemeTest.php

@@ -7,7 +7,7 @@ use BookStack\Entities\Models\Page;
 use BookStack\Entities\Tools\PageContent;
 use BookStack\Facades\Theme;
 use BookStack\Theming\ThemeEvents;
-use File;
+use Illuminate\Support\Facades\File;
 use Illuminate\Http\Request;
 use Illuminate\Http\Response;
 use League\CommonMark\ConfigurableEnvironmentInterface;