Add missing testing dependencies

Author: devfrey

composer.json

@@ -44,7 +44,9 @@
         "barryvdh/laravel-ide-helper": "^2.6",
         "codedungeon/phpunit-result-printer": "0.25.1",
         "friendsofphp/php-cs-fixer": "^2.16.1",
+        "fzaninotto/faker": "^1.9.1",
         "laravel/dusk": "^5.11",
+        "mockery/mockery": "^1.0",
         "php-mock/php-mock-phpunit": "^2.6",
         "phpunit/phpunit": "^7"
     },