slim down the lodash dependencies

package.json

@@ -31,6 +31,7 @@
     "eslint-plugin-mocha": "~1.1.0",
     "eslint-plugin-react": "~4.2.3",
     "expect.js": "~0.3.1",
+    "lodash": "~4.11.1",
     "mocha": "~2.4.5",
     "nyc": "~6.4.2",
     "proxyquire": "~1.7.4",
@@ -41,7 +42,8 @@
     "elasticsearch": "~11.0.1",
     "error": "~7.0.2",
     "in-publish": "~2.0.0",
-    "lodash": "~4.11.1",
+    "lodash.isplainobject": "~4.0.4",
+    "lodash.omit": "~4.2.1",
     "moment": "~2.10.6",
     "puid": "~1.0.5"
   }