lite: install typing-extensions to avoid capping fastapi versions

[freddyaboulton]

Description

Closes: #6010

See pyodide/pyodide#4234 (comment)

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[gradio-pr-bot]

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Install Gradio from this PR

pip install https://gradio-builds.s3.amazonaws.com/babe93b031967bd076924c461ddb1045d2e9a77e/gradio-3.50.2-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@babe93b031967bd076924c461ddb1045d2e9a77e#subdirectory=client/python"

[gradio-pr-bot]

🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
@gradio/wasm	minor

• Maintainers can select this checkbox to manually select packages to update.

With the following changelog entry.

lite: install typing-extensions to avoid capping fastapi versions

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[whitphx]

LGTM, thank you!