Well then except lodash.js, I don’t see in your dependencies something to spare at first site. Good to note that this source-map is only the size uncompressed, when you run build with --prod these are compressed too.
The screenshot only contains node_modules, how big is your code?
And do you include a lot of fonts?
If that could help, here a post I opened about app bundle size, maybe it could give you some ideas (I hope so):