Generate a dependency graph for every Elm package to be viewed in pm.
set TOKEN to a GitHub access token.
$ git clone https://github.com/brandly/allelm.git
$ cd allelm
$ npm install
# scrape `elm.json` files into ./packages
$ TOKEN=abc123 node index.js
# find exact versions for each dependency, calculate layout
# produces .bin files in data/
$ find ./packages -name '*.json' | node build-graph.js