How to release a new version

On devel branch:
- git pull to make sure everything is in sync with remote origin.
- Change the version in alpha_automl/__init__.py to the new version, e.g., 2.0.0 (using the format MAJOR.MINOR.PATCH).
- In CHANGELOG.md, change the first version, e.g. 2.0.0.dev0 (yyyy-mm-dd) to the to-be-released version and date.
- Commit with message Bump version for release.
- git push
On main branch:
- git pull to make sure everything is in sync with remote origin.
- Merge devel into main branch: git merge devel
- git push
- Release a package to PyPI:
  - rm -rf dist/
  - python setup.py sdist bdist_wheel
  - twine upload dist/*
- Create a tag for the new version, git tag <tag_name> and push it git push origin <tag_name>
On devel branch:
- git merge main to make sure devel is always on top of main.
- Change the version in alpha_automl/__init__.py appending .dev0 to the future version, e.g. 2.1.0.dev0.
- Add a new empty version on top of CHANGELOG.md, e.g. 2.1.0.dev0 (yyyy-mm-dd).
- Commit with message Bump version for development.
- git push