Question: how to best integrate external npm package

[SuperCipher]

Hi thankyou for the awsome project.

There is an npm package I really have to use.
Since I'm quite inexperience. I want to hear your thought on how to use npm package in this project,
Right now my hacky way is to use browserify to build my JS file and replace it in public/main.js. And add watch command in the elm-starter. Not sure if this is the best way to do it.
Let me hear your thought.
Thanks