Merge #45

45: build(deps): bump tokio from 1.21.2 to 1.24.1 in /example/build-with-buf r=neoeinstein a=dependabot[bot]

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.21.2 to 1.24.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/tokio-rs/tokio/releases">tokio's releases</a>.</em></p>
<blockquote>
<h2>Tokio v1.24.1</h2>
<p>This release fixes a compilation failure on targets without <code>AtomicU64</code> when using rustc older than 1.63. (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5356">#5356</a>)</p>
<p><a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5356">#5356</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5356">tokio-rs/tokio#5356</a></p>
<h2>Tokio v1.24.0</h2>
<p>The highlight of this release is the reduction of lock contention for all I/O operations (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5300">#5300</a>). We have received reports of up to a 20% improvement in CPU utilization and increased throughput for real-world I/O heavy applications.</p>
<h3>Fixed</h3>
<ul>
<li>rt: improve native <code>AtomicU64</code> support detection (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5284">#5284</a>)</li>
</ul>
<h3>Added</h3>
<ul>
<li>rt: add configuration option for max number of I/O events polled from the OS
per tick (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5186">#5186</a>)</li>
<li>rt: add an environment variable for configuring the default number of worker
threads per runtime instance (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/4250">#4250</a>)</li>
</ul>
<h3>Changed</h3>
<ul>
<li>sync: reduce MPSC channel stack usage (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5294">#5294</a>)</li>
<li>io: reduce lock contention in I/O operations  (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5300">#5300</a>)</li>
<li>fs: speed up <code>read_dir()</code> by chunking operations (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5309">#5309</a>)</li>
<li>rt: use internal <code>ThreadId</code> implementation (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5329">#5329</a>)</li>
<li>test: don't auto-advance time when a <code>spawn_blocking</code> task is running (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5115">#5115</a>)</li>
</ul>
<p><a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5186">#5186</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5186">tokio-rs/tokio#5186</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5294">#5294</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5294">tokio-rs/tokio#5294</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5284">#5284</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5284">tokio-rs/tokio#5284</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/4250">#4250</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/4250">tokio-rs/tokio#4250</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5300">#5300</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5300">tokio-rs/tokio#5300</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5329">#5329</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5329">tokio-rs/tokio#5329</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5115">#5115</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5115">tokio-rs/tokio#5115</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5309">#5309</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5309">tokio-rs/tokio#5309</a></p>
<h2>Tokio v1.23.1</h2>
<p>This release forward ports changes from 1.18.4.</p>
<h3>Fixed</h3>
<ul>
<li>net: fix Windows named pipe server builder to maintain option when toggling
pipe mode (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5336">#5336</a>).</li>
</ul>
<p><a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5336">#5336</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5336">tokio-rs/tokio#5336</a></p>
<h2>Tokio v1.23.0</h2>
<h3>Fixed</h3>
<ul>
<li>net: fix Windows named pipe connect (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5208">#5208</a>)</li>
<li>io: support vectored writes for <code>ChildStdin</code> (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5216">#5216</a>)</li>
<li>io: fix <code>async fn ready()</code> false positive for OS-specific events (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5231">#5231</a>)</li>
</ul>
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</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/tokio-rs/tokio/commit/31c7e8291993f42b27f5306fd0c33848c9fc796f"><code>31c7e82</code></a> chore: prepare Tokio v1.24.1 (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5357">#5357</a>)</li>
<li><a href="https://github.com/tokio-rs/tokio/commit/8d8db27442de797999f2facd44ec6bdb59143efc"><code>8d8db27</code></a> tokio: add load and compare_exchange_weak to loom StaticAtomicU64 (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5356">#5356</a>)</li>
<li><a href="https://github.com/tokio-rs/tokio/commit/dfe252d1fa82bdfefd7cba20f9a88cdd27e310cc"><code>dfe252d</code></a> chore: prepare Tokio v1.24.0 release (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5353">#5353</a>)</li>
<li><a href="https://github.com/tokio-rs/tokio/commit/21b233fa9c55ac69c8c74f0ca720aeba41c5c439"><code>21b233f</code></a> test: bump version of async-stream (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5347">#5347</a>)</li>
<li><a href="https://github.com/tokio-rs/tokio/commit/72993044e6d19d33e46966894e2a7cea4cfa1c4d"><code>7299304</code></a> Merge branch 'tokio-1.23.x' into master</li>
<li><a href="https://github.com/tokio-rs/tokio/commit/1a997ffbd62334af2553775234e75ede2d7d949f"><code>1a997ff</code></a> chore: prepare Tokio v1.23.1 release</li>
<li><a href="https://github.com/tokio-rs/tokio/commit/a8fe333cc45c14b0566d450dff8ff85fbe974fa0"><code>a8fe333</code></a> Merge branch 'tokio-1.20.x' into tokio-1.23.x</li>
<li><a href="https://github.com/tokio-rs/tokio/commit/ba81945ffc2695b71f2bbcadbfb5e46ec55aaef3"><code>ba81945</code></a> chore: prepare Tokio 1.20.3 release</li>
<li><a href="https://github.com/tokio-rs/tokio/commit/763bdc967e3e128d1e6e000238f1d257a81bf59a"><code>763bdc9</code></a> ci: run WASI tasks using latest Rust</li>
<li><a href="https://github.com/tokio-rs/tokio/commit/9f98535877f8f706b436447952f40f153e2a52dc"><code>9f98535</code></a> Merge remote-tracking branch 'origin/tokio-1.18.x' into fix-named-pipes-1.20</li>
<li>Additional commits viewable in <a href="https://github.com/tokio-rs/tokio/compare/tokio-1.21.2...tokio-1.24.1">compare view</a></li>
</ul>
</details>
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