chore(package): update browserify to version 14.0.0

https://greenkeeper.io/

package.json

@@ -49,7 +49,7 @@
     "vexflow": "^1.2.53"
   },
   "devDependencies": {
-    "browserify": "^13.0.1",
+    "browserify": "^14.0.0",
     "chai": "^3.5.0",
     "grunt": "^1.0.1",
     "grunt-browserify": "^5.0.0",