Remove unneeded dev dependencies

Author: ivanvermeyen

composer.json

@@ -25,8 +25,6 @@
         "php": "^7.2"
     },
     "require-dev": {
-        "fzaninotto/faker": "~1.4",
-        "mockery/mockery": "1.2.*",
         "orchestra/testbench": "~4.0",
         "phpunit/phpunit": "~8.0",
         "spatie/laravel-translatable": "^4.2"