build(deps): bump nix from 0.25.0 to 0.29.0 (#7)

Bumps [nix](https://github.com/nix-rust/nix) from 0.25.0 to 0.29.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/nix-rust/nix/blob/master/CHANGELOG.md">nix's
changelog</a>.</em></p>
<blockquote>
<h2>[0.29.0] - 2024-05-24</h2>
<h3>Added</h3>
<ul>
<li>Add <code>getregset()/setregset()</code> for
Linux/glibc/x86/x86_64/aarch64/riscv64 and
<code>getregs()/setregs()</code> for Linux/glibc/aarch64/riscv64
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2044">#2044</a>)</li>
<li>Add socket option Ipv6Ttl for apple targets.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2287">#2287</a>)</li>
<li>Add socket option UtunIfname.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2325">#2325</a>)</li>
<li>make SigAction repr(transparent) &amp; can be converted to the libc
raw type
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2326">#2326</a>)</li>
<li>Add <code>From</code> trait implementation for conversions between
<code>sockaddr_in</code> and
<code>SockaddrIn</code>, <code>sockaddr_in6</code> and
<code>SockaddrIn6</code>
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2328">#2328</a>)</li>
<li>Add socket option ReusePortLb for FreeBSD.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2332">#2332</a>)</li>
<li>Added support for openat2 on linux.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2339">#2339</a>)</li>
<li>Add if_indextoname function.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2340">#2340</a>)</li>
<li>Add <code>mount</code> and <code>unmount</code> API for apple
targets.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2347">#2347</a>)</li>
<li>Added <code>_PC_MIN_HOLE_SIZE</code> for <code>pathconf</code> and
<code>fpathconf</code>.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2349">#2349</a>)</li>
<li>Added <code>impl AsFd for pty::PtyMaster</code>
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2355">#2355</a>)</li>
<li>Add <code>open</code> flag <code>O_SEARCH</code> to AIX,
Empscripten, FreeBSD, Fuchsia, solarish,
WASI (<a
href="https://redirect.github.com/nix-rust/nix/pull/2374">#2374</a>)</li>
<li>Add prctl function <code>prctl_set_vma_anon_name</code> for
Linux/Android.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2378">#2378</a>)</li>
<li>Add <code>sync(2)</code> for
<code>apple_targets/solarish/haiku/aix/hurd</code>,
<code>syncfs(2)</code> for
<code>hurd</code> and <code>fdatasync(2)</code> for
<code>aix/hurd</code>
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2379">#2379</a>)</li>
<li>Add fdatasync support for Apple targets.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2380">#2380</a>)</li>
<li>Add <code>fcntl::OFlag::O_PATH</code> for FreeBSD and Fuchsia
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2382">#2382</a>)</li>
<li>Added <code>PathconfVar::MIN_HOLE_SIZE</code> for apple_targets.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2388">#2388</a>)</li>
<li>Add <code>open</code> flag <code>O_SEARCH</code> to apple_targets
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2391">#2391</a>)</li>
<li><code>O_DSYNC</code> may now be used with <code>aio_fsync</code> and
<code>fcntl</code> on FreeBSD.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2404">#2404</a>)</li>
<li>Added <code>Flock::relock</code> for upgrading and downgrading
locks.
(<a
href="https://redirect.github.com/nix-rust/nix/pull/2407">#2407</a>)</li>
</ul>
<h3>Changed</h3>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/nix-rust/nix/commit/1dad4d8d04a2cd187fae87cb91c4f4e95ff0decd"><code>1dad4d8</code></a>
chore: prepare for 0.29.0</li>
<li><a
href="https://github.com/nix-rust/nix/commit/f7431971b40f9516e6c8d280db353fd55d7ac7d7"><code>f743197</code></a>
fix ControlMessageOwned::UdpGroSegments UDP packets processing type. (<a
href="https://redirect.github.com/nix-rust/nix/issues/2406">#2406</a>)</li>
<li><a
href="https://github.com/nix-rust/nix/commit/208b80b65d9a54bac3172b97af81cfe90dd6412b"><code>208b80b</code></a>
recvmsg: Check if CMSG buffer was too small and return an error (<a
href="https://redirect.github.com/nix-rust/nix/issues/2413">#2413</a>)</li>
<li><a
href="https://github.com/nix-rust/nix/commit/ecd12a99907d6b1c9f43e88c087b1c6a2f633750"><code>ecd12a9</code></a>
test: remove test of inode count in test_statfs.rs (<a
href="https://redirect.github.com/nix-rust/nix/issues/2414">#2414</a>)</li>
<li><a
href="https://github.com/nix-rust/nix/commit/663506a602251675c66efcd9d25a2dfc3c2c61da"><code>663506a</code></a>
fix: only close <code>fanotify</code> events with a valid fd (<a
href="https://redirect.github.com/nix-rust/nix/issues/2399">#2399</a>)</li>
<li><a
href="https://github.com/nix-rust/nix/commit/1604723757735e59bf3142209b22b250b7412d40"><code>1604723</code></a>
revert: impl From&lt;sigaction&gt; for SigAction (<a
href="https://redirect.github.com/nix-rust/nix/issues/2410">#2410</a>)</li>
<li><a
href="https://github.com/nix-rust/nix/commit/ec4beb5a2229159021298d56af16e18a9151fb4e"><code>ec4beb5</code></a>
docs: correct limit value of FAN_UNLIMITED_QUEUE and
FAN_UNLIMITED_MARKS[skip...</li>
<li><a
href="https://github.com/nix-rust/nix/commit/84c0444c3a957b8bffd5172848d4ea73eb06c3ff"><code>84c0444</code></a>
chore: bump libc to 0.2.155 (<a
href="https://redirect.github.com/nix-rust/nix/issues/2409">#2409</a>)</li>
<li><a
href="https://github.com/nix-rust/nix/commit/c5af4adffd876605002e3a8a22b53fe9c83206d3"><code>c5af4ad</code></a>
Add Flock::relock (<a
href="https://redirect.github.com/nix-rust/nix/issues/2407">#2407</a>)</li>
<li><a
href="https://github.com/nix-rust/nix/commit/e7acaff07f39ece39eae38a45c82810bfbbf58cd"><code>e7acaff</code></a>
Enable O_DSYNC on FreeBSD with fcntl and aio_fsync (<a
href="https://redirect.github.com/nix-rust/nix/issues/2404">#2404</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/nix-rust/nix/compare/v0.25.0...v0.29.0">compare
view</a></li>
</ul>
</details>
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boringtun/Cargo.toml

@@ -44,7 +44,7 @@ socket2 = { version = "0.4.7", features = ["all"], optional = true }
 thiserror = { version = "1", optional = true }
 
 [target.'cfg(unix)'.dependencies]
-nix = { version = "0.25", default-features = false, features = [
+nix = { version = "0.29", default-features = false, features = [
     "time",
     "user",
 ] }