fix(types): accept a sequence of suggested prompts in assistant context

[zimeg]

Summary

This PR accepts a sequence of suggested prompts in the assistant context. Fixes an issue where mypy complained about invalid types:

listeners/assistant/assistant.py:50: error: Argument "prompts" to "__call__" of "SetSuggestedPrompts" has incompatible type "list[dict[str, str]]"; expected "list[str | dict[str, str]]" [arg-type]
listeners/assistant/assistant.py:50: note: "list" is invariant -- see https://mypy.readthedocs.io/en/stable/common_issues.html#variance
listeners/assistant/assistant.py:50: note: Consider using "Sequence" instead, which is covariant

https://github.com/slack-samples/bolt-python-assistant-template/blob/ec9fb79117fb52bf3ccf0238d242af11ee50807f/listeners/assistant/assistant.py#L51

Testing

This error should vanish when using this build without changing app functionalities!

$ mypy --python-executable=.venv/bin/python app.py

Category

• slack_bolt.App and/or its core components
• slack_bolt.async_app.AsyncApp and/or its core components

Requirements

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you are agreeing to those rules.

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've run ./scripts/install_all_and_run_tests.sh after making the changes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (ai-apps@23a4731). Learn more about missing BASE report.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@ Coverage Diff @@## ai-apps #1382 +/- ##
==========================================
Coverage ? 91.03% ==========================================
Files ? 222 Lines ? 7514 Branches ? 0 ==========================================
Hits ? 6840 Misses ? 674 Partials ? 0 

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[WilliamBergamin]

Nice catch 💯

Praise the testing 🚀

[mwbrooks]

✅ Really good catch @zimeg! Thanks for going above & beyond with fixing this issue after finding it 🙇🏻

🧪 :chef-kiss: on the tests!

[zimeg]

@WilliamBergamin@mwbrooks Thanks! I'm finding python to have pleasant typings with these checks optional. Hoping to bring similar changes in the future too! 👾