chore(package): update browserify to version 13.0.0

http://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -52,7 +52,7 @@
     "babel": "5.8.34",
     "babel-eslint": "4.1.6",
     "babelify": "6.4.0",
-    "browserify": "12.0.1",
+    "browserify": "13.0.0",
     "chai": "3.4.1",
     "core-js": "2.0.2",
     "coveralls": "2.11.6",