fix(tox): fix basepython for pypi-publish

3 jobs for branch/default in 2 minutes and 9 seconds (queued for 14 seconds)
Status Job ID Name Coverage
  Lint
passed check-manifest #90790

00:00:41

passed flake8 #90791

00:00:29

 
  Test
passed py27 #90792

00:01:28