build(deps-dev): bump postcss from 8.4.29 to 8.4.30 (#95)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.29 to
8.4.30.
<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>8.4.30</h2>
<ul>
<li>Improved source map performance (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>8.4.30</h2>
<ul>
<li>Improved source map performance (by Romain Menke).</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/postcss/postcss/commit/45c55017776fc61f7815d1ea8e92d5291ca5d6c8"><code>45c5501</code></a>
Release 8.4.30 version</li>
<li><a
href="https://github.com/postcss/postcss/commit/bc3c341f589f9c15f1b56838a33d908374e537e0"><code>bc3c341</code></a>
Update linter</li>
<li><a
href="https://github.com/postcss/postcss/commit/b2be58a2eb788d12474ee1335f8ecdb9fa6225aa"><code>b2be58a</code></a>
Merge pull request <a
href="https://redirect.github.com/postcss/postcss/issues/1881">#1881</a>
from romainmenke/improve-sourcemap-performance--phil...</li>
<li><a
href="https://github.com/postcss/postcss/commit/6a291d64253575f8c407711ae432f7470d1bbd05"><code>6a291d6</code></a>
apply suggestions from code review</li>
<li><a
href="https://github.com/postcss/postcss/commit/efa442c3e181b8714302bf0bfdfe92a11b7db3ae"><code>efa442c</code></a>
Update lib/map-generator.js</li>
<li><a
href="https://github.com/postcss/postcss/commit/de33cf6b44a7d60e8e7e4e094970a08abe152a57"><code>de33cf6</code></a>
improve sourcemap performance</li>
<li><a
href="https://github.com/postcss/postcss/commit/1c6ad2549eb4b0aa2744bf45a40e74d4d72e82aa"><code>1c6ad25</code></a>
Highlight banner with lines</li>
<li><a
href="https://github.com/postcss/postcss/commit/e10d5c097de83aa00c90c18efd7add38781ae2a7"><code>e10d5c0</code></a>
More more detailed text below</li>
<li><a
href="https://github.com/postcss/postcss/commit/3ff5f5f06d2a55e5b04c23903e96ad0f4d5f417e"><code>3ff5f5f</code></a>
Rephrase into</li>
<li><a
href="https://github.com/postcss/postcss/commit/272aae4ff28beeaa50ad7e0f7f060fb6fe6776d7"><code>272aae4</code></a>
Remove old banner</li>
<li>Additional commits viewable in <a
href="https://github.com/postcss/postcss/compare/8.4.29...8.4.30">compare
view</a></li>
</ul>
</details>
<br />


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</details>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -3,7 +3,7 @@
     "@netlify/plugin-lighthouse": "^5.0.0",
     "autoprefixer": "^10.4.16",
     "netlify-plugin-hugo-cache-resources": "^0.2.1",
-    "postcss": "^8.4.29",
+    "postcss": "^8.4.30",
     "postcss-cli": "^10.0.0",
     "postcss-color-mod-function": "^3.0.3"
   }