Bumps [parking_lot](https://github.com/Amanieu/parking_lot) from 0.11.2
to 0.12.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/Amanieu/parking_lot/blob/master/CHANGELOG.md">parking_lot's
changelog</a>.</em></p>
<blockquote>
<h2>parking_lot 0.12.1 (2022-05-31)</h2>
<ul>
<li>Fixed incorrect memory ordering in <code>RwLock</code>. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/344">#344</a>)</li>
<li>Added <code>Condvar::wait_while</code> convenience methods (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/343">#343</a>)</li>
</ul>
<h2>parking_lot_core 0.9.3 (2022-04-30)</h2>
<ul>
<li>Bump windows-sys dependency to 0.36. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/339">#339</a>)</li>
</ul>
<h2>parking_lot_core 0.9.2, lock_api 0.4.7 (2022-03-25)</h2>
<ul>
<li>Enable const new() on lock types on stable. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/325">#325</a>)</li>
<li>Added <code>MutexGuard::leak</code> function. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/333">#333</a>)</li>
<li>Bump windows-sys dependency to 0.34. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/331">#331</a>)</li>
<li>Bump petgraph dependency to 0.6. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/326">#326</a>)</li>
<li>Don't use pthread attributes on the espidf platform. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/319">#319</a>)</li>
</ul>
<h2>parking_lot_core 0.9.1 (2022-02-06)</h2>
<ul>
<li>Bump windows-sys dependency to 0.32. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/316">#316</a>)</li>
</ul>
<h2>parking_lot 0.12.0, parking_lot_core 0.9.0, lock_api 0.4.6
(2022-01-28)</h2>
<ul>
<li>The MSRV is bumped to 1.49.0.</li>
<li>Disabled eventual fairness on wasm32-unknown-unknown. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/302">#302</a>)</li>
<li>Added a rwlock method to report if lock is held exclusively. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/303">#303</a>)</li>
<li>Use new <code>asm!</code> macro. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/304">#304</a>)</li>
<li>Use windows-rs instead of winapi for faster builds. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/311">#311</a>)</li>
<li>Moved hardware lock elision support to a separate Cargo feature. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/313">#313</a>)</li>
<li>Removed used of deprecated <code>spin_loop_hint</code>. (<a
href="https://redirect.github.com/Amanieu/parking_lot/issues/314">#314</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/336a9b31ff385728d00eb7ef173e4d054584b787"><code>336a9b3</code></a>
Release parking_lot 0.12.1</li>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/b69a0547ce6c92b164528c65daafa48e8f1c08bb"><code>b69a054</code></a>
Merge pull request <a
href="https://redirect.github.com/Amanieu/parking_lot/issues/343">#343</a>
from bryanhitc/master</li>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/3fe7233ee05fbae9bc94a831d4e66df0257880a2"><code>3fe7233</code></a>
Merge pull request <a
href="https://redirect.github.com/Amanieu/parking_lot/issues/344">#344</a>
from Amanieu/fix_rwlock_ordering</li>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/ef12b00daf0dbc6dd025098ec2cd0517bb9f737c"><code>ef12b00</code></a>
small test update</li>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/fdb063cd4e33d9c44cc08aea0c341ffec7e7b282"><code>fdb063c</code></a>
wait_while can't timeout fix</li>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/26e19dced4ae01000abc0dfca251f56695b1b8aa"><code>26e19dc</code></a>
Remove WaitWhileResult</li>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/d26c284fe8413bdeeed3ef4f70e23b5919a9ffeb"><code>d26c284</code></a>
Fix incorrect memory ordering in RwLock</li>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/045828381a5facff71b1aad3c01af15801959458"><code>0458283</code></a>
Use saturating_add for WaitWhileResult</li>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/686db4755913947219f83a04b21885032685d246"><code>686db47</code></a>
Add Condvar::wait_while convenience methods</li>
<li><a
href="https://github.com/Amanieu/parking_lot/commit/6f6e021ced6f67fef8002442aa97c4a08ed5c3e4"><code>6f6e021</code></a>
Merge pull request <a
href="https://redirect.github.com/Amanieu/parking_lot/issues/342">#342</a>
from MarijnS95/patch-1</li>
<li>Additional commits viewable in <a
href="https://github.com/Amanieu/parking_lot/compare/0.11.2...0.12.1">compare
view</a></li>
</ul>
</details>
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