* Don't fail CI if codecov fails
* Remove codecov from dev-requirements.txt
* Pin packaging dependency to 21.3
* Pin coverage to 6.5.0
* Pin coverage to 6.2
* Downgrade packaging
* Drop Python 3.6 from test matrix
* Reenable Python 3.6 in tests
* Downgrade coverage req
* Make a different dev-requirements file for Python 3.6
* Moved dev-requirements-36 to root dir
Selwin Ong