Upgrade grunt-browserify.

Author: jmdobry

package.json

@@ -42,8 +42,8 @@
     "karma-mocha": "~0.1.3",
     "karma-sinon": "~1.0.3",
     "time-grunt": "~0.3.1",
-    "browserify": "^3.46.1",
-    "grunt-browserify": "^2.0.8"
+    "browserify": "4.1.3",
+    "grunt-browserify": "2.1.0"
   },
   "scripts": {
     "test": "node node_modules/grunt-cli/bin/grunt test"