Rearrange dependencies

package.json

@@ -46,13 +46,14 @@
     "express-ws": "2.0.0-rc.1",
     "fs-extra": "^1.0.0",
     "glob": "^7.0.5",
-    "gulp": "^3.9.1",
+    "gulp": "3.9.1",
     "gulp-cli": "^1.2.2",
     "gulp-coveralls": "^0.1.4",
     "gulp-istanbul": "^1.1.1",
     "gulp-mocha": "^3.0.1",
     "gulp-sourcemaps": "1.9.1",
     "gulp-typescript": "^3.1.3",
+    "gulp-util": "3.0.8",
     "jsdoc": "3.4.3",
     "jsdom": "^11.1.0",
     "merge-stream": "^1.0.1",
@@ -62,8 +63,7 @@
     "tslint": "^4.0.2",
     "typescript": "~2.2.0",
     "vinyl-buffer": "^1.0.0",
-    "vinyl-source-stream": "^1.1.0",
-    "gulp-util": "^3.0.8"
+    "vinyl-source-stream": "^1.1.0"
   },
   "scripts": {
     "prestart": "npm run build",