DEP(deps): Update cachetools requirement from ~=5.5.2 to ~=6.2.1

[dependabot]

Updates the requirements on cachetools to permit the latest version.

Changelog

Sourced from cachetools's changelog.

v6.2.1 (2025-10-12)

• Add support for Python 3.14.

• Improve documentation.

• Update CI environment.

v6.2.0 (2025-08-25)

• Improve general RRCache performance by storing cache keys in an additional sequence container. Note that this will increase memory consumption.

• Add more unit tests.

v6.1.0 (2025-06-16)

• Improve LFUCache insertion performance by switching to an implementation based on the cacheing <https://pypi.org/project/cacheing/>_ library.

• Update CI environment.

v6.0.0 (2025-05-23)

• Require Python 3.9 or later (breaking change).

• Remove MRUCache and the @func.mru_cache decorator (breaking change).

• Add an optional condition parameter to the @cached and @cachedmethod decorators, which, when used with a threading.Condition instance, should improve cache stampede <https://en.wikipedia.org/wiki/Cache_stampede>_ issues in massively parallel environments. Note that this will inflict some performance penalty, and therefore has to be enabled explicitly.

• Convert the cachetools.func decorators to use a threading.Condition instance to deal with cache stampede <https://en.wikipedia.org/wiki/Cache_stampede>_ issues. Note that this may result in a noticable performance degradation, depending on your actual use case.

... (truncated)

Commits

• ca7508f Release v6.2.1.
• f719307 Fix #339: Improve documentation regarding funtion default arguments.
• b32d00b Fix typos.
• a9a7e2c Move extended @​ttl_cache docs to proper place.
• 072b7e1 docs: clarify what units the ttl argument uses (i.e., seconds)
• b620ef9 Add support for Python 3.14.
• 8d7b64f Bump actions/checkout from 4.2.2 to 5.0.0
• feb17ff Bump codecov/codecov-action from 5.4.3 to 5.5.1
• 22c1652 Bump actions/setup-python from 5.6.0 to 6.0.0
• 4a238ad Release v6.2.0.
• Additional commits viewable in compare view

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[dependabot]

Superseded by #1910.