Automatically create release notes

[notlmn]

Closes #27.

[fregante]

This should be merged with npm-publish.yml because its push won't cause this workflow to run (and also because it's part of the same process)

[fregante]

Doesn't notlmn/release-with-changelog currently depend on the "tag push" event?

https://github.com/notlmn/release-with-changelog/blob/a3b2ce4e86a700ecfd8f13ff9a928afc1fd4dd11/index.js#L13

The tag here is created on line 26, so this has to follow it:

       - run: git push --follow-tags
       - uses: notlmn/release-with-changelog@v1
         env:
           RELEASE_TOKEN: ${{ secrets.GITHUB_TOKEN }}

[fregante]

Thank you!