Configuration file validation not working

[forsyth2]

It looks like the configuration file validation (https://github.com/E3SM-Project/zppy/blob/main/zppy/__main__.py#L169) isn't working anymore.

While working on #281, I tried removing a trailing comma and the validator passed, even though it has historically failed in such cases -- see #290. I tried setting active = 4, which I would have expected to fail since active expects a bool value; however validation passed and a ValueError: Invalid value 4 for 'active' appeared during runtime.

It appears that something has changed in the validation process.

[forsyth2]

I tried going back to v2.0.0 (Feb. 2022 -- https://github.com/E3SM-Project/zppy/releases/tag/v2.0.0):

$ git checkout -b test-validation 00828089733cc3ad9351e4a98902bd20fce5c163
$ emacs tests/integration/test_complete_run.cfg
# Set `active = 4`, remove a trailing comma for `years`
$ pip install .
$ zppy -c tests/integration/test_complete_run.cfg
# Behavior is the same as above.

This occurs regardless of using a conda environment from July 2022 or from building a conda environment based on the setup of the code in Feb. 2022.

[forsyth2]

#338 will at least fix the trailing comma error, so this is not urgent for the December 2022 release.