Update nix requirement from 0.23 to 0.24

[dependabot[bot]]

Updates the requirements on nix to permit the latest version.

Changelog

Sourced from nix's changelog.

[0.24.0] - 2022-04-21

Added

• Added fine-grained features flags. Most Nix functionality can now be conditionally enabled. By default, all features are enabled. (#1611)
• Added statfs FS type magic constants for target_os = "android" and synced constants with libc v0.2.121. (#1690)
• Added fexecve on DragonFly. (#1577)
• sys::uio::IoVec is now Send and Sync (#1582)
• Added EPOLLEXCLUSIVE on Android. (#1567)
• Added fdatasync for FreeBSD, Fuchsia, NetBSD, and OpenBSD. (#1581)
• Added sched_setaffinity and sched_getaffinity on DragonFly. (#1537)
• Added posix_fallocate on DragonFly. (#1621)
• Added SO_TIMESTAMPING support (#1547)
• Added getter methods to MqAttr struct (#1619)
• Added the TxTime sockopt and control message. (#1564)
• Added POSIX per-process timer support (#1622)
• Added sendfile on DragonFly. (#1615)
• Added UMOUNT_NOFOLLOW, FUSE_SUPER_MAGIC on Linux. (#1634)
• Added getresuid, setresuid, getresgid, and setresgid on DragonFly, FreeBSD, and OpenBSD. (#1628)
• Added MAP_FIXED_NOREPLACE on Linux. (#1636)
• Added fspacectl on FreeBSD (#1640)
• Added accept4 on DragonFly, Emscripten, Fuchsia, Illumos, and NetBSD. (#1654)
• Added AsRawFd implementation on OwningIter. (#1563)
• Added process_vm_readv and process_vm_writev on Android. (#1557)
• Added nix::uncontext module on s390x. (#1662)
• Implemented Extend, FromIterator, and IntoIterator for SigSet and added SigSet::iter and SigSetIter. (#1553)

... (truncated)

Commits

• 7f5907c (cargo-release) version 0.24.0
• bfb290b Merge #1698
• f05789c Merge #1694
• 7497b8a Update FreeBSD CI image to 12.3. 12.2 is EoL.
• 23f18df Pin nightly compiler used in CI for uclibc
• 145c240 Use singular number for all feature names
• 256707e Merge #1643
• 0b58f29 Replace the IoVec type with IoSlice and IoSliceMut
• 3b786fd Merge #1692
• a4b5dfc Add IP_DONTFRAG and IPV6_DONTFRAG SockOpts
• Additional commits viewable in compare view

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