build(deps-dev): bump postcss from 8.4.28 to 8.4.29 (#87)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.28 to
8.4.29.
<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>8.4.29</h2>
<ul>
<li>Fixed <code>Node#source.offset</code> (by <a
href="https://github.com/idoros"><code>@​idoros</code></a>).</li>
<li>Fixed docs (by <a
href="https://github.com/coliff"><code>@​coliff</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>8.4.29</h2>
<ul>
<li>Fixed <code>Node#source.offset</code> (by Ido Rosenthal).</li>
<li>Fixed docs (by Christian Oliff).</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/postcss/postcss/commit/fee54488fa20b9073053e715548389aa224d5c2e"><code>fee5448</code></a>
Release 8.4.29 version</li>
<li><a
href="https://github.com/postcss/postcss/commit/3360c3988371f83865ba5f9649c367396a10c299"><code>3360c39</code></a>
Update dependencies</li>
<li><a
href="https://github.com/postcss/postcss/commit/ade41459911814e84d600665918e7e7523517700"><code>ade4145</code></a>
Merge pull request <a
href="https://redirect.github.com/postcss/postcss/issues/1879">#1879</a>
from idoros/ido/fix-location-offset</li>
<li><a
href="https://github.com/postcss/postcss/commit/9a7077bdb58d9d8188fdb8b98d50596e7912f123"><code>9a7077b</code></a>
fix: node end offset</li>
<li><a
href="https://github.com/postcss/postcss/commit/ce9f6b3faced7c3a60de6ebe19377cf67f836e10"><code>ce9f6b3</code></a>
Merge pull request <a
href="https://redirect.github.com/postcss/postcss/issues/1875">#1875</a>
from coliff/patch-1</li>
<li><a
href="https://github.com/postcss/postcss/commit/079ba25be2f68316824ae4984a1ca1a3fa1293d4"><code>079ba25</code></a>
Fix links on README.md</li>
<li>See full diff in <a
href="https://github.com/postcss/postcss/compare/8.4.28...8.4.29">compare
view</a></li>
</ul>
</details>
<br />


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</details>

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package.json

@@ -3,7 +3,7 @@
     "@netlify/plugin-lighthouse": "^5.0.0",
     "autoprefixer": "^10.4.15",
     "netlify-plugin-hugo-cache-resources": "^0.2.1",
-    "postcss": "^8.4.28",
+    "postcss": "^8.4.29",
     "postcss-cli": "^10.0.0",
     "postcss-color-mod-function": "^3.0.3"
   }