Python 3 11 support

[elijahbenizzy]

[Short description explaining the high-level reason for the pull request]

Changes

How I tested this

Notes

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.

[elijahbenizzy]

Removed tests, decided not to make it impossible to install as I don't want to create a new major version. Next major version release will probably be. 3.8 or 3.10 +.

[skrawcz]

I don't see how this fulfills requirements for 3.11 and removing 3.6

1. can the 3.6 commit be separate please?
2. I think there's a few changes that are missing:

• setup.py is not modified.
• requirements.txt isn't updated
• references to 3.6 python aren't removed -- line 79 in hamilton/base.py, line 91 in test_h_async.py

[elijahbenizzy]

I don't see how this fulfills requirements for 3.11 and removing 3.6

1. can the 3.6 commit be separate please?
2. I think there's a few changes that are missing:

• setup.py is not modified.
• requirements.txt isn't updated
• references to 3.6 python aren't removed -- line 79 in hamilton/base.py, line 91 in test_h_async.py

Can split out commits. See #291 (comment) for why I didn't fully remove 3.6 support. I think we'd have to cut a major version or break the semantic versioning rules. I guess we could cut a minor one...

[elijahbenizzy]

Think I got everything

[skrawcz]

I don't see how this fulfills requirements for 3.11 and removing 3.6

1. can the 3.6 commit be separate please?
2. I think there's a few changes that are missing:

• setup.py is not modified.
• requirements.txt isn't updated
• references to 3.6 python aren't removed -- line 79 in hamilton/base.py, line 91 in test_h_async.py

Can split out commits. See #291 (comment) for why I didn't fully remove 3.6 support. I think we'd have to cut a major version or break the semantic versioning rules. I guess we could cut a minor one...

As discussed. I think we're fine. Python 3.6 people just wont get new updates -- so no broken functionality for them.

[skrawcz]

@elijahbenizzy just requirements.txt -- doesn't need dataclasses conditional install anymore