Add GitHub hook to publish to NPM when a new release is created

[iaincollins]

Currently I publish new releases manually with npm publish.

After the release of 2.0 I would like to automated this with a GitHub workflow:

.github/workflows/npm-publish.yml

# Publishes module to registry when a new release is created.
#
# The following secrets need to be configured for this workflow:
#
# * NPM_TOKEN - Auth token from npmjs.com

name: Publish to NPM

on:
  release:
    types: [created]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v1
        with:
          node-version: 12
      - run: npm ci
      - run: npm test

  publish-npm:
    needs: build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v1
        with:
          node-version: 12
          registry-url: https://registry.npmjs.org/
      - run: npm ci
      - run: npm publish
        env:
          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}

One consideration that may block this is that we don't currently have a suite of tests, which I think it is be sensible to introduce (even if in a limited form) before we automate publishing.

I would also like to automate publishing the current master to @beta or @canary so we can get a heads up of any issues. I see @ndom91 has been using some Conventional Commits, I'd be happy to start doing that if we want to automate sticking to semver more strictly.

[ndom91]

You probably have a bunch on your plate right now with all these issues / feature requests / PRs, so I figured I'd set this one up for you.. You just have to add your npm secret to this repo still.

#318

[ndom91]

@iaincollins can we close this now?

EDIT: You mentioned in #225 that it worked for the 2.2 release. Happy to hear! I'll close this issue then.

[iaincollins]

@ndom91 Thanks! <3 And thanks for finding and closing the issue! :D