Automate release process

[wetneb]

At the moment, publishing a release on GitHub will not automatically upload artifacts to Maven Central.
We could set up a GitHub Actions workflow to take care of that.

See: OpenRefine/OpenRefine#6185

[Abbe98]

Thinking out loud.

Why don't we merge Butterfly with OpenRefine at this point?

[wetneb]

It's definitely a possibility… I guess the only downside I can think of is that it would be making the OpenRefine repo a bit bigger (with longer build times, and so on) but arguably it would be a more faithful representation of the reality, letting us upgrade dependencies only once and use the same release schedule.

@tfmorris thoughts?

[tfmorris]

I support automated publishing of releases, but bundling seems to go counter to recent moves towards finer grained modularity (and discussion of replacing Butterfly's module system). Logically Butterfly and OpenRefine are very different things.