publish a wheel

[dimbleby]

I notice that this package publishes only source distributions, so that every user has to build the wheel themselves. That is slower, and can go wrong - eg #166.

Better for package owners to build and publish the wheel once, making it available all.

I did not find a workflow in this repository for publishing or I would have submitted a pull request. If you are doing this manually a typical workflow would be something like

python -m pip install build twine
python -m build
twine upload dist/*