Bump trio from 0.30.0 to 0.31.0

[dependabot]

Bumps trio from 0.30.0 to 0.31.0.

Release notes

Sourced from trio's releases.

v0.31.0

Full Changelog: python-trio/trio@v0.30.0...v0.31.0

Features

• Cancelled strings can now display the source and reason for a cancellation. Trio-internal sources of cancellation will set this string, and CancelScope.cancel now has a reason string parameter that can be used to attach info to any Cancelled to help in debugging. (python-trio/trio#3232)

Bugfixes

• Make ctrl+c work in more situations in the Trio REPL (python -m trio). (python-trio/trio#3007)
• Allow pickling trio.Cancelled, as they can show up when you want to pickle something else. This does not rule out pickling other NoPublicConstructor objects -- create an issue if necessary. (python-trio/trio#3248)
• Decrease import time on Windows by around 10%. (python-trio/trio#3263)
• Handle unwrapping SystemExit/KeyboardInterrupt exception gracefully in utility function raise_single_exception_from_group that reraises last exception from group. (python-trio/trio#3275)
• Ensure that the DTLS server does not mutate SSL context. (python-trio/trio#3277)
• Avoid having trio.as_safe_channel raise if closing the generator wrapped GeneratorExit in a BaseExceptionGroup. (python-trio/trio#3324)

Deprecations and removals

• Implement bool(trio.Event) and have it raise a DeprecationWarning and tell users to use trio.Event.is_set instead. This is an alternative to mypy --enable-error-code=truthy-bool for users who don't use type checking. (python-trio/trio#3322)

Miscellaneous internal changes

• When misnesting nurseries you now get a helpful RuntimeError instead of a catastrophic TrioInternalError. (python-trio/trio#3307)

Commits

• 94b7244 Bump version to 0.31.0
• 439de50 [pre-commit.ci] pre-commit autoupdate (#3327)
• cc148cf Suppress GeneratorExit from .aclose() for as_safe_channel (#3325)
• fc352b2 check for nursery misnesting on task exit (#3307)
• 5bfba27 Improve REPL KI (#3030)
• 7cc7f6b Define trio.Event.__bool__() to reduce bugs (#3322)
• 8dd7d8e Dependency updates (#3323)
• 02c3794 Remove typing_extensions requirement
• c3a0a76 , -> ;
• e34ce24 Add message properly
• Additional commits viewable in compare view

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