Bump the mycelium group with 3 updates

[dependabot]

Bumps the mycelium group with 3 updates: tokio, rcgen and nix.

Updates tokio from 1.52.2 to 1.52.3

Release notes

Sourced from tokio's releases.

Tokio v1.52.3

1.52.3 (May 8th, 2026)

Fixed

• sync: fix underflow in mpsc channel len() (#8062)
• sync: notify receivers in mpsc OwnedPermit::release() method (#8075)
• sync: require that an RwLock has max_readers != 0 (#8076)
• sync: return Empty from try_recv() when mpsc is closed with outstanding permits (#8074)

#8062: tokio-rs/tokio#8062 #8074: tokio-rs/tokio#8074 #8075: tokio-rs/tokio#8075 #8076: tokio-rs/tokio#8076

Commits

• d875691 chore: prepare Tokio v1.52.3 (#8130)
• e1aebb0 Merge 'tokio-1.51.3' into 'tokio-1.52.x' (#8129)
• fd63094 chore: prepare Tokio v1.51.3 (#8127)
• 8c600d0 Merge 'tokio-1.47.5' into 'tokio-1.51.x' (#8123)
• 11bfc13 chore: prepare Tokio v1.47.5 (#8122)
• f085b62 sync: notify receivers in mpsc OwnedPermit::release() method (#8075)
• 30d25cc sync: require that an RwLock has max_readers != 0 (#8076)
• 9fccf53 sync: return Empty from try_recv() when mpsc is closed with outstanding p...
• ebf61b4 sync: fix underflow in mpsc channel len() (#8062)
• See full diff in compare view

Updates rcgen from 0.14.7 to 0.14.8

Release notes

Sourced from rcgen's releases.

0.14.8

What's Changed

• Fix incorrect identifier for ML-DSA signature algorithms by @​DarkmatterVale in rustls/rcgen#412
• Upgrade yasna to 0.6 by @​djc in rustls/rcgen#419
• Add support for is_ca in CSR Params by @​5Dev24 in rustls/rcgen#420
• Add support for serializing BasicConstraints in CSR's by @​5Dev24 in rustls/rcgen#422
• update key_pair to signing_key in README.md by @​fakelozic in rustls/rcgen#427
• Fix encoding of directoryName constraints by @​sfackler in rustls/rcgen#429

Commits

• a70f083 Bump version to 0.14.8
• a32fdb1 Fix encoding of directoryName constraints
• 7111a79 update key_pair to signing_key
• 10664c9 Take semver-compatible dependency updates
• 0ec4d09 Add testing of CSR serializing basic constraints
• 5f94ef9 Add support for serializing BasicConstraints in CSR's
• fb835c1 Add writing basic constraints logic
• 0cf161d Bump codecov/codecov-action from 5 to 6
• 4909041 Add testing of CSR Params parsing Basic Constraints variants
• 6675a94 Add support for is_ca in CSR Params
• Additional commits viewable in compare view

Updates nix from 0.31.2 to 0.31.3

Changelog

Sourced from nix's changelog.

[0.31.3] - 2026-05-11

Added

• Enable module ioctl for Cygwin (#2715)
• Add CLOCK_BOOTTIME/CLOCK_PROCESS_CPUTIME_ID/CLOCK_THREAD_CPUTIME_ID/CLOCK_UPTIME to NetBSD-like platforms (#2716)
• unistd: add mkfifo for redox (#2749)
• Added kevent64 support on apple targets: Kqueue::kevent64, KEvent64, and Kevent64Flags. (#2781)

Fixed

• fix SaFlags_t definition on redox (#2751)
• Fixed EpollEvent::events() to use from_bits_retain instead of from_bits().unwrap(), preventing panics when the kernel returns unknown epoll flags. (#2783)
• Fixed KEvent::flags() and KEvent::fflags() to use from_bits_retain instead of from_bits().unwrap(), preventing panics when the kernel returns unknown kqueue flags. (#2784)

Commits

• b5933ca chore: release v0.31.3
• 5d6a46e Replace Cirrus CI with more Github Workflows jobs (#2776)
• 3407489 event: add kevent64 support on apple targets (#2781)
• fe80fc5 chore: resolve clippy useless_borrows_in_formatting (#2790)
• 3310fc7 Revert "fix(ci): temporarily disable armv7-unknown-linux-uclibceabihf (#2764)...
• e3ab917 epoll: use from_bits_retain to avoid panics on unknown flags (#2783)
• 6c15701 kqueue: use from_bits_retain to avoid panics on unknown flags (#2784)
• 73028cf fix(ci): enable Hurd target (#2765)
• 1a680a9 cargo: Remove deprecated package authors field (#2789)
• 85cff07 docs: add missing changelog entries (#2786)
• Additional commits viewable in compare view

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[dependabot]

Looks like these dependencies are updatable in another way, so this is no longer needed.