Update GitHub actions and python versions

[mboersma]

Description

CI recently began failing because Python 3.6 is no longer supported. This updates the GH actions we use and bumps the python version support to 3.7 - 3.11.

History Notes

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• [x] The PR title and description has followed the guideline in Submitting Pull Requests.
• [x] I adhere to the Command Guidelines.
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