Update version on release

[tekktrik]

1. CI will not fix version strings before uploading to PyPI!
2. Now builds pure Python wheels as well besides uploading source distributions, which hopefully speeds up installation

[makermelissa]

Hmm, looks like it's now failing with:

Run for file in $(find -not -path "./.*" -not -path "./docs*" \( -name "*.py" -o -name "*.toml" \) ); do
  for file in $(find -not -path "./.*" -not -path "./docs*" \( -name "*.py" -o -name "*.toml" \) ); do
      sed -i -e "s/0.0.0+auto.0/8.4.1/" $file;
  done;
  python -m build
  twine upload dist/*
  shell: /usr/bin/bash -e {0}
  env:
    pythonLocation: /opt/hostedtoolcache/Python/[3](https://github.com/adafruit/Adafruit_Blinka/actions/runs/3091573017/jobs/5001808934#step:6:3).10.6/x6[4](https://github.com/adafruit/Adafruit_Blinka/actions/runs/3091573017/jobs/5001808934#step:6:4)
    TWINE_USERNAME: ***
    TWINE_PASSWORD: ***
/opt/hostedtoolcache/Python/3.10.[6](https://github.com/adafruit/Adafruit_Blinka/actions/runs/3091573017/jobs/5001808934#step:6:6)/x64/bin/python: No module named build
Error: Process completed with exit code 1.

Unfortunately these actions PRs are not really easily testable outside of putting them in place and hoping for the best.

[tekktrik]

Fix incoming :)