Merge pull request #356 from mozilla/fix/import-lodash-merge

Only import lodash.merge instead of full library

src/storage/store.js

 import { Validator } from "jsonschema";
-import { merge } from "lodash";
+import merge from "lodash/merge";
 
 const LOCAL_STORE_KEY = "___hubs_store";
 const STORE_STATE_CACHE_KEY = Symbol();