Update browserify

Closes GH-2.

Author: greenkeeperio-bot

package.json

@@ -27,7 +27,7 @@
  "vfile-location": "^2.0.0"
  },
  "devDependencies": {
- "browserify": "^13.0.1",
+ "browserify": "^14.0.0",
  "esmangle": "^1.0.1",
  "is-hidden": "^1.0.1",
  "negate": "^1.0.0",