chore(package): update browserify to version 14.1.0

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -39,7 +39,7 @@
     "unist-util-visit": "^1.1.0"
   },
   "devDependencies": {
-    "browserify": "^13.0.1",
+    "browserify": "^14.1.0",
     "esmangle": "^1.0.1",
     "istanbul": "^0.4.4",
     "remark": "^6.2.0",