[PyPI] Update tox config, add environment for uploading to PyPI

4 jobs for topic/default/upload-to-pypi in 54 seconds (queued for 32 seconds)
Status Job ID Name Coverage
  Tests
passed #63514
black

00:00:53

passed #63513
check-manifest

00:00:36

passed #63512
flake8

00:00:37

passed #63511
py3

00:00:47