Fixed single lodash import

no issue

- the dot notation only works if you install a single lodash dependency e.g. `yarn install lodash.get`
- otherwise we have to use `lodash/get`

core/server/helpers/asset.js

@@ -3,7 +3,7 @@
 //
 // Returns the path to the specified asset. The ghost flag outputs the asset path for the Ghost admin
 const proxy = require('./proxy'),
-    get = require('lodash.get'),
+    get = require('lodash/get'),
     getAssetUrl = proxy.metaData.getAssetUrl,
     SafeString = proxy.SafeString;