Add debugbar at require dev

Author: torralbodavid

composer.json

@@ -26,6 +26,7 @@
         "watson/rememberable": "dev-master"
     },
     "require-dev": {
+        "barryvdh/laravel-debugbar": "^3.6",
         "beyondcode/laravel-query-detector": "^1.3",
         "facade/ignition": "^2.3.6",
         "fzaninotto/faker": "^1.9.1",