workflows: release script

[mathe42]

@tobiemh asked if we can have a automatic npm publish script when a new tag is pushed. (see #24 (comment))

This issue is to discuss this. There are 2 options:

1. Only have run npm publish on new tag
2. Have a full worflow described as below for it.

You would trigger it manualy like in grafik

You choose what type of release you want and klick "run". The action will do (in this order):

1. Calculate new version (depending if this is a major, minor or patch)
2. Update package.json and commit
3. Install npm dependencies
4. Run npm run build
5. Run npm run publish
6. Add a tag with calculated version and push version

[tobiemh]

I would say, no need for the workflow. Just the simple npm publish when a new tag for the moment.

Either way the process of creating a new version is manual, but would be great to get the publishing to NPM (Deno is automatic already obviously) through the API.