add release action

[thrau]

add github action to release rolo automatically. here's a guide by the PyPA: https://packaging.python.org/en/latest/guides/publishing-package-distribution-releases-using-github-actions-ci-cd-workflows/

[alexrashed]

Just as an idea: Since this is a nice and clean new repo, we could maybe even craft a generalized workflow in localstack/meta to prep a workflow which we can directly reuse for our next library. 🚀