chore(deps): update asgiref requirement from <4,>=3.11.1 to >=3.12.1,<4

[dependabot]

Updates the requirements on asgiref to permit the latest version.

Changelog

Sourced from asgiref's changelog.

3.12.1 (2026-07-14)

• Restored the previous SyncToAsync.call internal code shape, which was relied on by some APM services. (#572)

  Note, this change was available whilst maintaining the underlying fix (from #564). It does not constitute an API stability promise. Ideally APMs are not monkey patching internal APIs, and future changes will be made here if needed.

3.12.0 (2026-07-14)

• AsyncToSync no longer captures the running event loop on instantiation. (#562)

  This resolves a series of deadlocks that users experienced after asgiref 3.9.0, particularly with pytest-asyncio. pytest-asyncio stops the event loop between tests, and long-running unawaited futures could find themselves trying to schedule work onto a stopped loop, and so would never complete. Ideally, code should be structured to await long-running futures before returning, but this change should help users experiencing issues here.

  The loop is now resolved when the callable is invoked rather than when it is created. If async_to_sync is called from within sync_to_async, the parent event loop is still used, as before.

  The possibility of deadlock therefore remains in some nested patterns. For example, an async function may call a long-running sync_to_async function that itself uses async_to_sync; if the outer function returns before the sync future completes, the parent event loop may already be stopped, and the nested calls cannot be driven to completion.

  This is not a bug in asgiref — the same patterns deadlock in plain asyncio. As above, restructure your code to await the sync_to_async future before exiting the driving coroutine.

• Fixed an event loop deadlock when exiting ThreadSensitiveContext while its executor thread was still blocked waiting on the event loop. (#535)

• Dropped support for EOL Python 3.9.

• Fixed StatelessServer.run() failing on Python 3.14, where asyncio.get_event_loop() no longer creates an event loop if none exists. It now uses asyncio.run(). (#559)

• Fixed Local leaking data between unrelated sync threads when sys.flags.thread_inherit_context is enabled (Python 3.14+), so a newly

... (truncated)

Commits

• ef9d4b8 Releasing 3.12.1
• 34fba63 Restore previous SyncToAsync.call internal code shape.
• a43900c Separate mypy from tests extra.
• 1b7c338 Releasing 3.12.0
• 157d9d4 Renovate precommit (#552)
• deda0d4 Test free-threading builds and fix Local data leak for thread_inherit_context...
• a54250a Don’t capture the event loop in AsyncToSync.__init__ (#562)
• 836356a Use asyncio.run in StatelessServer.run (#561)
• e04afd5 Dropped support for Python 3.9. (#543)
• 95d2430 Fixed #535: ThreadSensitiveContext.aexit blocking the event loop. (#563)
• Additional commits viewable in compare view

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.54%. Comparing base (3ca19a0) to head (c0f9f8e).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1580   +/-   ##
=======================================
  Coverage   91.54%   91.54%           
=======================================
  Files         228      228           
  Lines        7285     7285           
=======================================
  Hits         6669     6669           
  Misses        616      616           

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