Update filelock requirement from <3.20,>=3.4 to >=3.31.1,<3.32

[dependabot]

Updates the requirements on filelock to permit the latest version.

Release notes

Sourced from filelock's releases.

3.31.1

What's Changed

• ♻️ refactor(coverage): key exclusions on probed capability by @​gaborbernat in tox-dev/filelock#679
• scope a lease's claim to the context that acquired it by @​dxbjavid in tox-dev/filelock#680

Full Changelog: tox-dev/filelock@3.31.0...3.31.1

Changelog

Sourced from filelock's changelog.

########### Changelog ###########

.. towncrier-draft-entries:: Unreleased

.. towncrier release notes start

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3.31.1 (2026-07-20)

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• A SoftFileLease acquired on one thread keeps its claim when another thread fails to acquire the same lease object, so its heartbeat carries on refreshing the marker instead of being torn down and letting a peer take the live claim. :pr:680

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3.31.0 (2026-07-18)

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• Support Termux/Android, whose CPython ships without os.link and reports sys.platform == "android". import filelock and both FileLock and SoftFileLock now work there, StrictSoftFileLock reports its missing hard-link support only when acquired, and process liveness reads /proc on Android instead of PID-only checks. :pr:678
• StrictSoftFileLock no longer lets two processes hold the lock at once under heavy contention. A holder now keeps its intent claim for the whole hold, so a contender whose directory scan races the holder's freshly linked claim can no longer miss it and win alongside it. A held lock now exposes both an intent and a held claim. :pr:678

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3.30.3 (2026-07-17)

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• AsyncFileLock and AsyncSoftFileLock no longer raise a deadlock RuntimeError when a different asyncio task waits for a lock they hold; the check now scopes holders to the owning task, so only a same-task reacquire is refused. :pr:676
• Keep both tables of contents on screen at any browser font size. The widened body column sized itself in em against the reader's font size while the breakpoints that fold the layout resolve em against a fixed 16px, so a reader whose default font is larger than 16px had the right-hand table of contents clipped off the edge. The body column now flexes instead, and the right-hand table of contents hides only at the mobile breakpoint. :pr:673
• Color the mermaid diagrams from whichever theme is active. They previously carried a light palette baked into each diagram's source, which stayed light on a dark page. :pr:674

---

3.30.2 (2026-07-16)

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• Stop :class:~filelock.SoftFileLease deleting a live marker whose mode it does not implement. An unrecognized mode now names its owner instead of reading as malformed, so a record written by a newer filelock survives the grace window rather than being evicted after two seconds. :pr:672
• Stop :class:~filelock.StrictSoftFileLock and :class:~filelock.AsyncStrictSoftFileLock calling themselves a native OS lock when they warn that they ignore lifetime; they now say a strict claim is only ever cleared by force_break(). :pr:672
• Cover every lock type in the tutorials and how-to guides, with examples drawn from projects that use filelock, and color the mermaid diagrams. Correct the claims that StrictSoftFileLock exposes owner, that :class:~filelock.SoftFileLock evicts a strict sentinel, that :class:~filelock.ReadWriteLock requires a .db extension, and that every log record is DEBUG. :pr:672

---

3.30.1 (2026-07-16)

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• StrictSoftFileLock and AsyncStrictSoftFileLock no longer abort acquisition when a peer's claim vanishes as an

... (truncated)

Commits

• c1b2e6f Release 3.31.1
• 9fd7de5 scope a lease's claim to the context that acquired it (#680)
• 2b3ad2c ♻️ refactor(coverage): key exclusions on probed capability (#679)
• 3b66fdc Release 3.31.0
• 166b2b5 ✨ feat(platform): support Termux/Android (#678)
• 51bca89 Release 3.30.3
• fc27700 asyncio: scope the reentrant-deadlock registry to the owning task (#676)
• 8699861 📝 docs(mermaid): follow the light and dark theme toggle (#674)
• 1b8da43 Keep both tables of contents on screen at any browser font size (#673)
• 9a71d06 Release 3.30.2
• Additional commits viewable in compare view

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.01%. Comparing base (63f28b1) to head (2c39973).
⚠️ Report is 16 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #558   +/-   ##
=======================================
  Coverage   75.01%   75.01%           
=======================================
  Files          91       91           
  Lines        4567     4567           
=======================================
  Hits         3426     3426           
  Misses       1141     1141           

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