build.yml

[cclauss]

Upgrade to actions/setup-python@v2 and use TOXENV=py, not py3x as discussed at
https://docs.github.com/en/actions/guides/building-and-testing-python#running-tests-with-tox

[facelessuser]

You can upgrade to V2 but please do not change the TOXENV. That variable is used to distinguish between which run is which and then to setup the other build variables based on the current running test.

The docs may suggest to use py, but that does not mean that we are doing anything incorrect, just different.

[facelessuser]

In doing this, I'd prefer it is done in not only build.yml but also deploy.yml. I've made the change in #223 as it is a very easy change. It should upgrade the dependency as requested and resolve this request as well. Thank you for alerting us to the fact that setup-python@v2 is available!