BurnMan release checklist

[bobmyhill]

This checklist should be completed for every release of BurnMan
WARNING: New releases are automatically uploaded to PyPi. Make sure everything is right before you make the new release.

• Check new version can be used non-locally (python -m pip install ., then run from another directory)
• Open zenodo (https://zenodo.org/record/7080174), start new version, reserve DOI (currently at the top of Basic Information)
• New branch (burnman-Major.Minor)
• Bump version number in new branch (in pyproject.toml)
• Update changelog.txt with major changes since the last release.
• Update pyproject.toml (if necessary, probably only Python versions need checking (as we've checked the installation works above)
• Update new link to the zenodo version (using the new reserved DOI) in burnman/init.py
• Update new link to the zenodo version (using the new reserved DOI) in docs/index.rst
• Update new badge link to zenodo (using the new reserved DOI) in Readme.md
• Update author list in zenodo.
• Push new branch to Github upstream burnman-Major.Minor (not master)
• Make release on Github using upstream burnman-Major.Minor branch
• Make release commit (tag, not branch) active on readthedocs (you'll need to build from master first so that ReadTheDocs finds the new release tag)
• Build documentation on readthedocs
• Download zip file
• Upload new zip file to zenodo, fill in details on website (including new link to ReadTheDocs and github version)
• Save and publish in zenodo
• Update GitHub release with new zip files and link to the ReadTheDocs documentation
• Merge upstream burnman-Major.Minor branch to master
• Bump version numbers in pyproject.toml on upstream master to [Major].[Minor].[Patch+1]a0
• Check and update homepage (especially the downloads section for version numbers and the zenodo links)