Releasing on PyPI

1. Update the version in pyproject.toml and __version__ insrc/init.py`. We use semantic versioning
2. Create a branch called release-x.x.x
3. At the command line, run make tag
4. Go to tags page, choose the most recent tag, and click Draft a new release
5. Click Generate release notes and then Publish release notes
6. Run make changelog
7. Use git commit and git push any files changed by this release
8. Send up with git push origin release-x.x.x
9. Merge to main