Added gulp to the dev dependencies, necessary for running tests

Author: pilotnyc

package.json

@@ -22,6 +22,7 @@
   "main": "index.js",
   "devDependencies": {
     "faucet": "0.0.1",
+    "gulp": "^3.8.11",
     "tape": "^3.5.0"
   }
 }