Add Support for Python 3.12 in LangFair

[kmadan]

📌 Description

This PR adds official support for Python 3.12 by:

• Updating pyproject.toml to allow Python 3.12 (python = ">=3.9,<3.13").
• Regenerating poetry.lock to reflect updated dependencies.
• Running the full test suite (pytest tests/) to confirm compatibility.

CC: @langfair-maintainers

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📌 Contributor License Agreement

• I confirm that I have signed the [LangFair CLA](https://forms.office.com/pages/responsepage.aspx?id=uGG7-v46dU65NKR_eCuM1xbiih2MIwxBuRvO0D_wqVFUMlFIVFdYVFozN1BJVjVBRUdMUUY5UU9QRS4u&route=shorturl)

📌 Tests

• No new tests required (Existing test suite was sufficient)
• New tests added
• Existing tests adjusted

📌 Explanation:

• No code logic was changed, so no new tests were required.
• Ran the full test suite, and all 30 tests passed ✅.

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📌 Documentation

• No documentation changes needed
• README updated
• API docs added or updated
• Example notebook added or updated

📌 Explanation:
Since this PR only updates Python version support, no documentation updates were needed.

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📌 Screenshots

📌 Test Results Output:

================================== 30 passed, 6 warnings in 460.10s (0:07:40) ==================================

[dylanbouchard]

👋 @kmadan, thank you very much for creating this PR. Very excited to include support for Python 3.12 in LangFair!

Can you please make the following changes:

• remove changes to .gitignore
• remove tests/test_langfair312.py
• update .github/workflows/ci.yaml to include 3.12 in tests?

Afterward, I will run tests and approve. Thank you!

[dylanbouchard]

I think we can remove these changes to the .gitignore for this PR

[dylanbouchard]

As far as I can tell, this file is not needed. Can you please remove it?

[kmadan]

Yes, this is not required. 👍

[kmadan]

👋 @dylanbouchard thank you for the helpful feedback and for taking the time to review my PR! I've removed the changes to .gitignore, deleted tests/test_langfair312.py, and updated .github/workflows/ci.yaml to include Python 3.12 in the test matrix. The tests are currently in progress, and I appreciate your patience. Please let me know if there’s anything else needed. Thanks again for your support!

[dylanbouchard]

Looks good!