deps: update uvicorn requirement from >=0.23 to >=0.52.4

[dependabot]

Updates the requirements on uvicorn to permit the latest version.

Release notes

Sourced from uvicorn's releases.

Version 0.52.4

Fixed

• Remove duplicate Date headers from accepted WebSocket handshakes with websockets-sansio (#3078)

Full Changelog: Kludex/uvicorn@0.52.3...0.52.4

Changelog

Sourced from uvicorn's changelog.

0.52.4 (August 18, 2026)

Fixed

• Remove duplicate Date headers from accepted WebSocket handshakes with websockets-sansio (#3078)

0.52.3 (August 13, 2026)

Changed

• Update zttp to 0.0.24 and use its combined receive path, improving HTTP/1.1 request parsing performance (#3067)

0.52.2 (August 13, 2026)

Fixed

• Update zttp to 0.0.22, fixing bodyless request receives and improving HTTP/1 request parsing performance (#3063)

0.52.1 (August 1, 2026)

Fixed

• Complete the closing handshake on server-initiated WebSocket closes in the websockets-sansio and wsproto implementations, waiting for the client's close reply with a 10 second timeout instead of resetting the connection (#3053)
• Add missing write flow control to the websockets-sansio implementation, preventing data truncation on server-initiated closes with large in-flight payloads (#3048)
• Handle connection loss while a WebSocket write is waiting on backpressure (#3050)
• Remove duplicate Content-Type and Content-Length headers from WebSocket denial responses on the websockets-sansio implementation, and deliver non-UTF-8 denial bodies intact (#3041)

0.52.0 (July 29, 2026)

This release adds an experimental HTTP/1.1 implementation backed by zttp, a sans-IO HTTP parser I've been developing on the side: a core written in Zig, with bindings to Python. It has been running under a fuzzer for some weeks now, and has been through multiple rounds of security auditing.

It is still experimental, so don't put it in front of production traffic yet. Try it with --http zttp, and please send any feedback to the issue tracker.

Added

• Add an experimental zttp HTTP/1.1 implementation, selectable with --http zttp (#2979)

Fixed

• Keep non-ASCII WebSocket request headers intact with websockets 17.0, which encodes them with ISO-8859-1 (#3036)

0.51.0 (July 8, 2026)

Added

• Restart workers one at a time on SIGHUP, bringing each replacement up before retiring the old worker, so reloads no longer drop requests (#3025)

Removed

• Remove colorama from the standard extra (#3027)

... (truncated)

Commits

• 8988c23 Stabilize macOS Python 3.13 signal shutdown tests (#3084)
• 898ddca Update PyPI publish action to version 1.14.2 (#3083)
• 3869f8a Restore Mermaid diagram rendering (#3080)
• 64148a9 Version 0.52.4 (#3079)
• 9e9e569 docs: correct release example PR number (#3072)
• b783dac Remove duplicate Date header from SansIO WebSocket handshakes (#3078)
• 27019b2 chore(deps): bump the python-packages group across 1 directory with 11 update...
• 1b64273 Fix a typo in index.md (#3006)
• a68da60 Version 0.52.3 (#3068)
• 6e3bb4c Use zttp 0.0.24 fast receive path (#3067)
• Additional commits viewable in compare view

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[DenisDrobyshev]

Closing: uvicorn 0.52.4 requires Python ≥3.10, and CI tests 3.9. The bump would fail that leg at install, the same way #17 (mypy) and #25 (pytest) did.

uvicorn is genuinely used — deploy/Dockerfile runs it as the container command — so this is not the unused-dependency case. It is the support-matrix case. See #30.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.