Setup for release

[andylintner]

Added release automation via Github workflow and upload to Maven Central for SNAPSHOTs and releases.

First step in resolving #128

Pull Request Checklist

Please confirm that you've done the following when opening a new pull request:

• For fixes and other improvements, please reference the GitHub issue that your change addresses.
• [n/a] For fixes, optimizations and new features, please add an entry to the CHANGES.md file.
• Run mvn compile before committing, so that the auto-code formatter will format your changes consistently with the rest of the project.