build(deps-dev): bump sinon from 20.0.0 to 21.0.0 (#345)

Bumps [sinon](https://github.com/sinonjs/sinon) from 20.0.0 to 21.0.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/sinonjs/sinon/blob/main/docs/changelog.md">sinon's
changelog</a>.</em></p>
<blockquote>
<h2>21.0.0</h2>
<ul>
<li><a
href="https://github.com/sinonjs/sinon/commit/fd10f13f3fed7853dd489dd9e84f28c22df715c2"><code>fd10f13f</code></a>
chore!: remove assert.failException property (<a
href="https://redirect.github.com/sinonjs/sinon/issues/2659">#2659</a>)
(Morgan Roderick)
<blockquote>
<p>This was used for allowing customisation of the thrown error between
sandboxes and for customisation for integrations (most likely from the
days of BusterJS).</p>
<p>To my knowledge and what I've been able to find on GitHub, this has
never had any <em>production</em> use by end users.</p>
<p>BREAKING CHANGE: this removes assert.failException from the API</p>
</blockquote>
</li>
<li><a
href="https://github.com/sinonjs/sinon/commit/c7202351b62f171169ea1c0c6b7cb94be6a2e413"><code>c7202351</code></a>
Revert &quot;chore: npm audit&quot; (Morgan Roderick)
<blockquote>
<p>This reverts commit 824da531173204e4106bf15ab2677b6193802893.</p>
</blockquote>
</li>
<li><a
href="https://github.com/sinonjs/sinon/commit/824da531173204e4106bf15ab2677b6193802893"><code>824da531</code></a>
chore: npm audit (Morgan Roderick)</li>
<li><a
href="https://github.com/sinonjs/sinon/commit/14edd78eaa9cc80c3810b8b020b973ddff6dfda2"><code>14edd78e</code></a>
chore: upgrade esbuild (Morgan Roderick)</li>
<li><a
href="https://github.com/sinonjs/sinon/commit/1ac5af9c24a6a66fbdbba8d4ceb9399f6272baa3"><code>1ac5af9c</code></a>
npm audit (Morgan Roderick)</li>
</ul>
<p><em>Released by Morgan Roderick on 2025-06-13.</em></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a
href="https://github.com/sinonjs/sinon/commits">compare view</a></li>
</ul>
</details>
<br />


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package-lock.json

@@ -180,7 +180,7 @@
     "glob": "^11.0.3",
     "minimatch": "^10.0.1",
     "mocha": "^11.7.1",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "split2": "^4.2.0",
     "stacktrace-parser": "^0.1.11",
     "supports-color": "^10.0.0",