chore: Update tox config to generate mypy coverage reports

6 jobs for !42 with topic/default/mypy-coverage in 2 minutes and 52 seconds (queued for 47 seconds)
latest detached
Status Name Job ID Coverage
  Tests
passed check-manifest #293739

00:00:31

passed flake8 #293737

00:00:27

passed mypy #293738

00:00:48

passed py3 #293735

00:00:40

passed py3-from-forge #293736

00:00:55

 
  After Tests
passed trigger-cubicweb-pipeline