[MRG+1] Add builds for Python 3.10

[aaronreidsmith]

Description

This PR adds builds for Python 3.10, which was released on 2021-10-04. WIP because we will need to wait for dependencies to support 3.10

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation change

How Has This Been Tested?

Hasn't yet 🤠

Checklist:

• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have made corresponding changes to the documentation
• [X] My changes generate no new warnings
• [X] I have added tests that prove my fix is effective or that my feature works
• [X] New and existing unit tests pass locally with my changes

[aaronreidsmith]

Need to add a warning for the 32-bit deprecation, but otherwise I think this is good to go

[aaronreidsmith]

Need to add a warning for the 32-bit deprecation, but otherwise I think this is good to go

Added in 941098d