message: Change mikeholler to PYPI_USERNAME
diff: @@ -5,7 +5,7 @@ PROD_REPOSITORY="https://upload.pypi.org/legacy/"
  TEST_REPOSITORY="https://test.pypi.org/legacy/"
  twine upload \
  - --username mikeholler \
  + --username "$PYPI_USERNAME" \
  --password "$PYPI_PASSWORD" \
  --repository-url "$PROD_REPOSITORY" \
  "$DIR/../python/dist/"*
  