Move Faker to require-dev section

- Fixes #940 and resolves #940
- Move Faker to dev section of composer.json

composer.json

@@ -73,7 +73,6 @@
         "omnipay/braintree": "~2.0@dev",
         "gatepay/FedACHdir": "dev-master@dev",
         "websight/l5-google-cloud-storage": "^1.0",
-        "fzaninotto/faker": "^1.5",
         "wepay/php-sdk": "^0.2",
         "collizo4sky/omnipay-wepay": "dev-additional-calls"
     },
@@ -84,7 +83,8 @@
         "codeception/c3": "~2.0",
         "symfony/dom-crawler": "~3.0",
         "barryvdh/laravel-ide-helper": "~2.2",
-        "barryvdh/laravel-debugbar": "~2.2"
+        "barryvdh/laravel-debugbar": "~2.2",
+        "fzaninotto/faker": "^1.5"
     },
     "autoload": {
         "classmap": [