add ignition

Author: taylorotwell

composer.json

@@ -14,6 +14,7 @@
         "laravel/tinker": "^1.0"
     },
     "require-dev": {
+        "facade/ignition": "^1.4",
         "filp/whoops": "^2.0",
         "fzaninotto/faker": "^1.4",
         "mockery/mockery": "^1.0",