chore(deps-dev): bump coverage from 7.4.1 to 7.4.3 (#432)

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.4.1 to
7.4.3.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst">coverage's
changelog</a>.</em></p>
<blockquote>
<h2>Version 7.4.3 — 2024-02-23</h2>
<ul>
<li>Fix: in some cases, coverage could fail with a RuntimeError:
&quot;Set changed
size during iteration.&quot; This is now fixed, closing <code>issue
1733</code>_.</li>
</ul>
<p>.. _issue 1733: <a
href="https://redirect.github.com/nedbat/coveragepy/issues/1733">nedbat/coveragepy#1733</a></p>
<p>.. _changes_7-4-2:</p>
<h2>Version 7.4.2 — 2024-02-20</h2>
<ul>
<li>Fix: setting <code>COVERAGE_CORE=sysmon</code> no longer errors on
3.11 and lower,
thanks <code>Hugo van Kemenade &lt;pull 1747_&gt;</code>_. It now issues
a warning that
sys.monitoring is not available and falls back to the default core
instead.</li>
</ul>
<p>.. _pull 1747: <a
href="https://redirect.github.com/nedbat/coveragepy/pull/1747">nedbat/coveragepy#1747</a></p>
<p>.. _changes_7-4-1:</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/nedbat/coveragepy/commit/1af36247955118a351999f40a6049baa179583ce"><code>1af3624</code></a>
docs: sample HTML for 7.4.3</li>
<li><a
href="https://github.com/nedbat/coveragepy/commit/f06c5e43f7dd3c0f6734120fc002212fd069efa3"><code>f06c5e4</code></a>
docs: prep for 7.4.3</li>
<li><a
href="https://github.com/nedbat/coveragepy/commit/08fc997b6b3d881e8e5082b71ad6d6bcc4e2f752"><code>08fc997</code></a>
fix: get atomic copies of iterables when flushing data. <a
href="https://redirect.github.com/nedbat/coveragepy/issues/1733">#1733</a></li>
<li><a
href="https://github.com/nedbat/coveragepy/commit/4e34571a0b18c8819cfa27e3149e05edfb397198"><code>4e34571</code></a>
build: put a time limit on the Python nightly tests</li>
<li><a
href="https://github.com/nedbat/coveragepy/commit/a1d8d2961c9793cf8d3fa09666012190cdec9214"><code>a1d8d29</code></a>
build: make targets should use underscores not dashes</li>
<li><a
href="https://github.com/nedbat/coveragepy/commit/f7d40a0f11f1830596a359db81d4b505415f7908"><code>f7d40a0</code></a>
build: tweak the release instructions</li>
<li><a
href="https://github.com/nedbat/coveragepy/commit/0f19b82390ad1bf57b617d0820b07766d90011c1"><code>0f19b82</code></a>
build: bump version</li>
<li><a
href="https://github.com/nedbat/coveragepy/commit/5d6933451e4b2ba1294fdbd9b33473e6a254a19b"><code>5d69334</code></a>
test: if a test fails randomly, let it retry with <a
href="https://github.com/flaky"><code>@​flaky</code></a></li>
<li><a
href="https://github.com/nedbat/coveragepy/commit/65d686c8eb76ef897291af898d53dee55c57f349"><code>65d686c</code></a>
docs: sample HTML for 7.4.2</li>
<li><a
href="https://github.com/nedbat/coveragepy/commit/026dca7d7e8591614ec035fe9f05a87808892686"><code>026dca7</code></a>
docs: prep for 7.4.2</li>
<li>Additional commits viewable in <a
href="https://github.com/nedbat/coveragepy/compare/7.4.1...7.4.3">compare
view</a></li>
</ul>
</details>
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