chore(deps-dev): Bump postcss from 8.5.8 to 8.5.9 (#1800)

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.8 to 8.5.9.
<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>8.5.9</h2>
<ul>
<li>Speed up source map encoding paring in case of the error.</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>8.5.9</h2>
<ul>
<li>Speed up source map encoding paring in case of the error.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="fe88ac29c0"><code>fe88ac2</code></a>
Release 8.5.9 version</li>
<li><a
href="c551632496"><code>c551632</code></a>
Avoid RegExp when we can use simple JS</li>
<li><a
href="89a6b74406"><code>89a6b74</code></a>
Move SECURITY.txt for docs folder to keep GitHub page cleaner</li>
<li><a
href="6ceb8a46af"><code>6ceb8a4</code></a>
Create SECURITY.md</li>
<li><a
href="02ccae6bc3"><code>02ccae6</code></a>
Another way to fix CI with .ts ext in tests on old Node.js</li>
<li><a
href="2c36658c7c"><code>2c36658</code></a>
Another way to fix CI with TS on old Node.js</li>
<li><a
href="b90600361f"><code>b906003</code></a>
Another way to fix CI with old Node.js</li>
<li><a
href="04d32cdc69"><code>04d32cd</code></a>
Fix another issue with Node.js 10 on CI</li>
<li><a
href="df86cdfff0"><code>df86cdf</code></a>
Try to fix Node.js 10 on CI</li>
<li><a
href="82bec0dd8e"><code>82bec0d</code></a>
Move to oxfmt</li>
<li>Additional commits viewable in <a
href="https://github.com/postcss/postcss/compare/8.5.8...8.5.9">compare
view</a></li>
</ul>
</details>
<br />


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package-lock.json

@@ -103,7 +103,7 @@
         "i18next-cli": "^1.51.7",
         "istanbul": "^0.4.5",
         "istanbul-lib-coverage": "^3.2.2",
-        "postcss": "^8.5.8",
+        "postcss": "^8.5.9",
         "react-hot-loader": "^4.13.1",
         "sass": "^1.99.0",
         "stylelint": "^17.6.0",
@@ -12132,9 +12132,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.8",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.8.tgz",
-      "integrity": "sha512-OW/rX8O/jXnm82Ey1k44pObPtdblfiuWnrd8X7GJ7emImCOstunGbXUpp7HdBrFQX6rJzn3sPT397Wp5aCwCHg==",
+      "version": "8.5.9",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.9.tgz",
+      "integrity": "sha512-7a70Nsot+EMX9fFU3064K/kdHWZqGVY+BADLyXc8Dfv+mTLLVl6JzJpPaCZ2kQL9gIJvKXSLMHhqdRRjwQeFtw==",
       "dev": true,
       "funding": [
         {

package.json

@@ -137,7 +137,7 @@
     "i18next-cli": "^1.51.7",
     "istanbul": "^0.4.5",
     "istanbul-lib-coverage": "^3.2.2",
-    "postcss": "^8.5.8",
+    "postcss": "^8.5.9",
     "react-hot-loader": "^4.13.1",
     "sass": "^1.99.0",
     "stylelint": "^17.6.0",