Release

Updating tags

git fetch --prune --prune-tags --tags upstream
git tag x.y.z
git push upstream x.y.z

Create wheels and sdist
```
python setup.py bdist_wheel sdist
```
Create a new env, install the wheel just created and run:
```
pytest --pyargs <package>
```
to check that all tests still pass.
Upload to Pypi

pip install twine -U
twine check dist/*
twine upload dist/* --verbose