build(deps): bump postcss from 8.4.47 to 8.4.49 (#793)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.47 to
8.4.49.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/postcss/postcss/releases">postcss's
releases</a>.</em></p>
<blockquote>
<h2>8.4.49</h2>
<ul>
<li>Fixed custom syntax without <code>source.offset</code> (by <a
href="https://github.com/romainmenke"><code>@​romainmenke</code></a>).</li>
</ul>
<h2>8.4.48</h2>
<ul>
<li>Fixed position calculation in error/warnings methods (by <a
href="https://github.com/romainmenke"><code>@​romainmenke</code></a>).</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/postcss/postcss/blob/main/CHANGELOG.md">postcss's
changelog</a>.</em></p>
<blockquote>
<h2>8.4.49</h2>
<ul>
<li>Fixed custom syntax without <code>source.offset</code> (by <a
href="https://github.com/romainmenke"><code>@​romainmenke</code></a>).</li>
</ul>
<h2>8.4.48</h2>
<ul>
<li>Fixed position calculation in error/warnings methods (by <a
href="https://github.com/romainmenke"><code>@​romainmenke</code></a>).</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/postcss/postcss/commit/aed8b899884db4bc89f60782771eecd8c7861b32"><code>aed8b89</code></a>
Release 8.4.49 version</li>
<li><a
href="https://github.com/postcss/postcss/commit/345063010bf5a9724589a9ee420bd511ec2b12bf"><code>3450630</code></a>
Fix position calculations when offset is missing (<a
href="https://redirect.github.com/postcss/postcss/issues/1983">#1983</a>)</li>
<li><a
href="https://github.com/postcss/postcss/commit/77420d62919b4d53921a113bbc939ad5e5b49fe6"><code>77420d6</code></a>
Release 8.4.48 version</li>
<li><a
href="https://github.com/postcss/postcss/commit/341529ff4e78d7b90526e6e2eb178573192b47e3"><code>341529f</code></a>
Update dependencies</li>
<li><a
href="https://github.com/postcss/postcss/commit/66fa667831bae59696d0b9ba54c2ee5b9dd74b6a"><code>66fa667</code></a>
Add Node.js 23 to CI</li>
<li><a
href="https://github.com/postcss/postcss/commit/1a8b261404348c7ba495af0707d6d244d66cf566"><code>1a8b261</code></a>
fix inconsistent position calculations (<a
href="https://redirect.github.com/postcss/postcss/issues/1980">#1980</a>)</li>
<li><a
href="https://github.com/postcss/postcss/commit/1cc6ac3bf43a12460d3396e2cb76f14075daea1b"><code>1cc6ac3</code></a>
Clarify usage in docs</li>
<li>See full diff in <a
href="https://github.com/postcss/postcss/compare/8.4.47...8.4.49">compare
view</a></li>
</ul>
</details>
<br />


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