Automate publishing wheels to `pypi.org`

[jameslamb]

Description

Wheels are not currently automatically published to pypi.org on releases.

They should be.

Benefits of this work

Reduces manual effort to release.

Acceptance Criteria

It's possible to release to pypi.org without any manual steps (other than maybe creating a release / tag).

Approach

Some projects to reference:

• https://github.com/rapidsai/pynvjitlink
• https://github.com/rapidsai/rapids-build-backend

Notes

It'd probably be good to do #102 first, or to do them together.