fix(package): include gulp devDependency

Author: Awk34

Diff for: package.json

@@ -50,10 +50,10 @@
     "yeoman-welcome": "^1.0.1"
   },
   "devDependencies": {
-    "chai": "^3.2.0",
-    "babel-register": "^6.6.5",
-    "babel-preset-es2015": "^6.6.0",
     "babel-plugin-transform-class-properties": "^6.6.0",
+    "babel-preset-es2015": "^6.6.0",
+    "babel-register": "^6.6.5",
+    "chai": "^3.2.0",
     "del": "^2.2.0",
     "grunt": "^1.0.1",
     "grunt-build-control": "^0.7.0",
@@ -64,6 +64,7 @@
     "grunt-env": "^0.4.1",
     "grunt-mocha-test": "^0.12.7",
     "grunt-release": "^0.13.0",
+    "gulp": "^3.9.1",
     "jit-grunt": "~0.10.0",
     "mocha": "^2.2.5",
     "q": "^1.0.1",