Create NPM package

[6nv]

And some workflow updates. Should be tested.

[6nv]

I reverted everything back to its original state and the workflow still doesn't pass...

I'll just finish writing what I would suggest, assuming the rest of the workflow will be updated to a working state.

[6nv]

How to setup, first-time:

1. Create an account on npm, and generate a publisher token.
2. Add that token as a Github secret in this repository, call it NPM_TOKEN
3. This workflow will attempt to publish to the npm registry
4. Make sure to increment the version number in package.json to publish, or it will skip that step

How to install the package:

After it has been published to the registry, users can install it via npm i psychrolib and then use the package normally in their node project.