tweak package file

package.json

@@ -1,7 +1,9 @@
 {
   "private": true,
   "devDependencies": {
-    "gulp": "^3.8.8",
+    "gulp": "^3.8.8"
+  },
+  "dependencies": {
     "laravel-elixir": "^2.0.0",
     "bootstrap-sass": "^3.0.0"
   }