chore(package): update lodash to version 4.17.4

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -27,7 +27,7 @@
   "dependencies": {
     "classnames": "^2.2.5",
     "lang-map": "^0.4.0",
-    "lodash": "^4.17.3",
+    "lodash": "^4.17.4",
     "parse-diff": "^0.4.0",
     "prismjs-package": "^0.7.21",
     "react": "^15.4.1",