upgrade old version of lodash

Author: baweaver

package.json

@@ -30,7 +30,7 @@
     "chalk": "1.0.0",
     "coa": "0.4.0",
     "diff": "1.0.8",
-    "lodash": "2.4.1",
+    "lodash": "^4.0.0",
     "parse5": "1.1.3",
     "vow": "0.4.13",
     "vow-fs": "0.3.6"