Bump mio from 0.8.8 to 0.8.11 (#3569)

Bumps [mio](https://github.com/tokio-rs/mio) from 0.8.8 to 0.8.11.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/tokio-rs/mio/blob/master/CHANGELOG.md">mio's
changelog</a>.</em></p>
<blockquote>
<h1>0.8.11</h1>
<ul>
<li>Fix receiving IOCP events after deregistering a Windows named pipe
(<a
href="https://redirect.github.com/tokio-rs/mio/pull/1760">tokio-rs/mio#1760</a>,
backport pr:
<a
href="https://redirect.github.com/tokio-rs/mio/pull/1761">tokio-rs/mio#1761</a>).</li>
</ul>
<h1>0.8.10</h1>
<h2>Added</h2>
<ul>
<li>Solaris support
(<a
href="https://redirect.github.com/tokio-rs/mio/pull/1724">tokio-rs/mio#1724</a>).</li>
</ul>
<h1>0.8.9</h1>
<h2>Added</h2>
<ul>
<li>ESP-IDF framework support
(<a
href="https://redirect.github.com/tokio-rs/mio/pull/1692">tokio-rs/mio#1692</a>).</li>
<li>AIX operating system support
(<a
href="https://redirect.github.com/tokio-rs/mio/pull/1704">tokio-rs/mio#1704</a>).</li>
<li>Vita support
(<a
href="https://redirect.github.com/tokio-rs/mio/pull/1721">tokio-rs/mio#1721</a>).</li>
<li><code>{UnixListener,UnixStream}:bind_addr</code>
(<a
href="https://redirect.github.com/tokio-rs/mio/pull/1630">tokio-rs/mio#1630</a>).</li>
<li><code>mio_unsupported_force_poll_poll</code> and
<code>mio_unsupported_force_waker_pipe</code>
<strong>unsupported</strong> configuration flags to force a specific
poll or waker
implementation
(<a
href="https://redirect.github.com/tokio-rs/mio/pull/1684">tokio-rs/mio#1684</a>,
<a
href="https://redirect.github.com/tokio-rs/mio/pull/1685">tokio-rs/mio#1685</a>,
<a
href="https://redirect.github.com/tokio-rs/mio/pull/1692">tokio-rs/mio#1692</a>).</li>
</ul>
<h2>Fixed</h2>
<ul>
<li>The <code>pipe(2)</code> based waker (swapped file descriptors)
(<a
href="https://redirect.github.com/tokio-rs/mio/pull/1722">tokio-rs/mio#1722</a>).</li>
<li>The duplicate waker check to work correctly with cloned
<code>Registry</code>s.
(<a
href="https://redirect.github.com/tokio-rs/mio/pull/1706">tokio-rs/mio#1706</a>).</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/tokio-rs/mio/commit/0328bdef900b6396b8d00d33c825cd8af748553d"><code>0328bde</code></a>
Release v0.8.11</li>
<li><a
href="https://github.com/tokio-rs/mio/commit/708449851283b57eb6f514c8f289b66e982720b3"><code>7084498</code></a>
Fix warnings</li>
<li><a
href="https://github.com/tokio-rs/mio/commit/90d4fe00df870acd3d38f3dc4face9aacab8fbb9"><code>90d4fe0</code></a>
named-pipes: fix receiving IOCP events after deregister</li>
<li><a
href="https://github.com/tokio-rs/mio/commit/c710a307f8627c4d63ac1003252aa45175e08399"><code>c710a30</code></a>
Add v0.8.x to the CI</li>
<li><a
href="https://github.com/tokio-rs/mio/commit/c29e21c244b2b835e8b3e015b92c708c33c7d70a"><code>c29e21c</code></a>
Release v0.8.10</li>
<li><a
href="https://github.com/tokio-rs/mio/commit/f6a20da1c81c2d56a78bc6f6832b9904b9215914"><code>f6a20da</code></a>
Add Solaris operating system support (<a
href="https://redirect.github.com/tokio-rs/mio/issues/1724">#1724</a>)</li>
<li><a
href="https://github.com/tokio-rs/mio/commit/e80c3b21b59b92238f4c8c331fcfc4a71508d1c5"><code>e80c3b2</code></a>
Release v0.8.9</li>
<li><a
href="https://github.com/tokio-rs/mio/commit/862786bbbf719886be55631c0d150d4813a9a1b6"><code>862786b</code></a>
Fix importing of IoSourceState</li>
<li><a
href="https://github.com/tokio-rs/mio/commit/40348728e4f06f5e150783d8f1559ee974e5e834"><code>4034872</code></a>
Add support for vita target</li>
<li><a
href="https://github.com/tokio-rs/mio/commit/8eb4010a92bede550850e177d3dd7c4c76eb90ba"><code>8eb4010</code></a>
Fix receiver and sender fd in pipe based waker</li>
<li>Additional commits viewable in <a
href="https://github.com/tokio-rs/mio/compare/v0.8.8...v0.8.11">compare
view</a></li>
</ul>
</details>
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