Bump tsdown from 0.21.1 to 0.21.4 (#29)

Bumps [tsdown](https://github.com/rolldown/tsdown) from 0.21.1 to
0.21.4.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/rolldown/tsdown/releases">tsdown's
releases</a>.</em></p>
<blockquote>
<h2>v0.21.4</h2>
<h3>   🚀 Features</h3>
<ul>
<li><strong>css</strong>: Add CSS modules support  -  by <a
href="https://github.com/sxzz"><code>@​sxzz</code></a> in <a
href="https://redirect.github.com/rolldown/tsdown/issues/834">rolldown/tsdown#834</a>
<a href="https://github.com/rolldown/tsdown/commit/2a88a67"><!-- raw
HTML omitted -->(2a88a)<!-- raw HTML omitted --></a></li>
</ul>
<h3>   🐞 Bug Fixes</h3>
<ul>
<li><strong>exports</strong>: Preserve CRLF line endings in package.json
 -  by <a href="https://github.com/sxzz"><code>@​sxzz</code></a> <a
href="https://github.com/rolldown/tsdown/commit/a4d4e1d"><!-- raw HTML
omitted -->(a4d4e)<!-- raw HTML omitted --></a></li>
</ul>
<h5>    <a
href="https://github.com/rolldown/tsdown/compare/v0.21.3...v0.21.4">View
changes on GitHub</a></h5>
<h2>v0.21.3</h2>
<h3>   🚀 Features</h3>
<ul>
<li><strong>copy</strong>: Add support for watching copy source files
 -  by <a href="https://github.com/schplitt"><code>@​schplitt</code></a>
in <a
href="https://redirect.github.com/rolldown/tsdown/issues/721">rolldown/tsdown#721</a>
<a href="https://github.com/rolldown/tsdown/commit/7c23ad8"><!-- raw
HTML omitted -->(7c23a)<!-- raw HTML omitted --></a></li>
</ul>
<h3>   🐞 Bug Fixes</h3>
<ul>
<li><strong>css</strong>: Watch inline CSS files in watch mode  -  by <a
href="https://github.com/sxzz"><code>@​sxzz</code></a> <a
href="https://github.com/rolldown/tsdown/commit/2051a40"><!-- raw HTML
omitted -->(2051a)<!-- raw HTML omitted --></a></li>
<li><strong>exports</strong>: Sort inlined dependencies by package name
 -  by <a href="https://github.com/sxzz"><code>@​sxzz</code></a> <a
href="https://github.com/rolldown/tsdown/commit/0ec719d"><!-- raw HTML
omitted -->(0ec71)<!-- raw HTML omitted --></a></li>
<li><strong>publint</strong>: Support Yarn v1  -  by <a
href="https://github.com/sxzz"><code>@​sxzz</code></a> <a
href="https://github.com/rolldown/tsdown/commit/4a29176"><!-- raw HTML
omitted -->(4a291)<!-- raw HTML omitted --></a></li>
<li><strong>unbundle</strong>: Root should be lowest common ancestor of
entry files  -  by <a
href="https://github.com/sxzz"><code>@​sxzz</code></a> <a
href="https://github.com/rolldown/tsdown/commit/f182324"><!-- raw HTML
omitted -->(f1823)<!-- raw HTML omitted --></a></li>
</ul>
<h5>    <a
href="https://github.com/rolldown/tsdown/compare/v0.21.2...v0.21.3">View
changes on GitHub</a></h5>
<h2>v0.21.2</h2>
<h3>   🚨 Breaking Changes</h3>
<ul>
<li><strong>exe</strong>: Add <code>exe.outDir</code> for separate
executable output dir, defaults to <code>build</code>  -  by <a
href="https://github.com/sxzz"><code>@​sxzz</code></a> <a
href="https://github.com/rolldown/tsdown/commit/d49ef37"><!-- raw HTML
omitted -->(d49ef)<!-- raw HTML omitted --></a></li>
</ul>
<blockquote>
<p>Note: Executable is still an <strong>experimental</strong> feature
and does not follow SemVer. Breaking changes may occur in any
release.</p>
</blockquote>
<h3>   🚀 Features</h3>
<ul>
<li>Add <code>root</code> option for controlling output directory
structure  -  by <a
href="https://github.com/sxzz"><code>@​sxzz</code></a> <a
href="https://github.com/rolldown/tsdown/commit/bad2d17"><!-- raw HTML
omitted -->(bad2d)<!-- raw HTML omitted --></a></li>
<li><strong>deps</strong>: Rename <code>onlyAllowBundle</code> to
<code>onlyBundle</code>  -  by <a
href="https://github.com/peaklabs-dev"><code>@​peaklabs-dev</code></a>
and <a href="https://github.com/sxzz"><code>@​sxzz</code></a> in <a
href="https://redirect.github.com/rolldown/tsdown/issues/819">rolldown/tsdown#819</a>
<a href="https://github.com/rolldown/tsdown/commit/cbd7b38"><!-- raw
HTML omitted -->(cbd7b)<!-- raw HTML omitted --></a></li>
</ul>
<h3>   🐞 Bug Fixes</h3>
<ul>
<li><strong>css</strong>: Skip data URIs and external URLs in CSS url()
rebasing  -  by <a
href="https://github.com/sxzz"><code>@​sxzz</code></a> <a
href="https://github.com/rolldown/tsdown/commit/139076c"><!-- raw HTML
omitted -->(13907)<!-- raw HTML omitted --></a></li>
</ul>
<h5>    <a
href="https://github.com/rolldown/tsdown/compare/v0.21.1...v0.21.2">View
changes on GitHub</a></h5>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/rolldown/tsdown/commit/c5d416647850b025668cad553debbfda02c8d05a"><code>c5d4166</code></a>
chore: release v0.21.4</li>
<li><a
href="https://github.com/rolldown/tsdown/commit/a4173511cf33980f1a2122bd8c369d84636f9b08"><code>a417351</code></a>
docs: update skills install commands with --skill flag</li>
<li><a
href="https://github.com/rolldown/tsdown/commit/cd4ce32535d57c7a725c937e822d4e8744673159"><code>cd4ce32</code></a>
refactor(docs): clarify deprecated-but-compatible migration options</li>
<li><a
href="https://github.com/rolldown/tsdown/commit/d622ca54e4bf2b43e28c0d51d94224cfe4ec08da"><code>d622ca5</code></a>
docs: clarify tsdown-migrate skill and deprecated options (<a
href="https://redirect.github.com/rolldown/tsdown/issues/835">#835</a>)</li>
<li><a
href="https://github.com/rolldown/tsdown/commit/f401a3b749998e0351e98c018250062a7614a7af"><code>f401a3b</code></a>
chore(deps): update all non-major dependencies (<a
href="https://redirect.github.com/rolldown/tsdown/issues/820">#820</a>)</li>
<li><a
href="https://github.com/rolldown/tsdown/commit/2a88a677cb26d3c38579908538eb24b1bb671757"><code>2a88a67</code></a>
feat(css): add CSS modules support (<a
href="https://redirect.github.com/rolldown/tsdown/issues/834">#834</a>)</li>
<li><a
href="https://github.com/rolldown/tsdown/commit/a4d4e1d88f36fc87c7043193c2559b850c9f660a"><code>a4d4e1d</code></a>
fix(exports): preserve CRLF line endings in package.json</li>
<li><a
href="https://github.com/rolldown/tsdown/commit/61514338f92ea5d9f3b8fc3c45d920de75ed1b14"><code>6151433</code></a>
chore: release v0.21.3</li>
<li><a
href="https://github.com/rolldown/tsdown/commit/7c23ad887919d9c05b8046712a291364d288988e"><code>7c23ad8</code></a>
feat(copy): add support for watching copy source files (<a
href="https://redirect.github.com/rolldown/tsdown/issues/721">#721</a>)</li>
<li><a
href="https://github.com/rolldown/tsdown/commit/f1823244c08987824c78e67c634ce26ff894a983"><code>f182324</code></a>
fix(unbundle): root should be lowest common ancestor of entry files</li>
<li>Additional commits viewable in <a
href="https://github.com/rolldown/tsdown/compare/v0.21.1...v0.21.4">compare
view</a></li>
</ul>
</details>
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