Bump postcss from 8.4.16 to 8.4.18 (#2282)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.16 to 8.4.18.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.16...8.4.18)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -63,7 +63,7 @@
     "globby": "13.1.2",
     "jest": "29.0.3",
     "js-yaml": "4.1.0",
-    "postcss": "8.4.16",
+    "postcss": "8.4.18",
     "postcss-calc": "8.2.4",
     "postcss-import": "15.0.0",
     "postcss-load-config": "4.0.1",

yarn.lock

@@ -4656,10 +4656,10 @@ postcss-value-parser@^4.0.0, postcss-value-parser@^4.0.2, postcss-value-parser@^
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz#723c09920836ba6d3e5af019f92bc0971c02e514"
   integrity sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==
 
-postcss@8.4.16, postcss@^8.1.0, postcss@^8.1.4, postcss@^8.2.4, postcss@^8.3.11, postcss@^8.3.6, postcss@^8.4.16:
-  version "8.4.16"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.16.tgz#33a1d675fac39941f5f445db0de4db2b6e01d43c"
-  integrity sha512-ipHE1XBvKzm5xI7hiHCZJCSugxvsdq2mPnsq5+UF+VHCjiBvtDrlxJfMBToWaP9D5XlgNmcFGqoHmUn0EYEaRQ==
+postcss@8.4.18, postcss@^8.1.0, postcss@^8.1.4, postcss@^8.2.4, postcss@^8.3.11, postcss@^8.3.6, postcss@^8.4.16:
+  version "8.4.18"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.18.tgz#6d50046ea7d3d66a85e0e782074e7203bc7fbca2"
+  integrity sha512-Wi8mWhncLJm11GATDaQKobXSNEYGUHeQLiQqDFG1qQ5UTDPTEvKw0Xt5NsTpktGTwLps3ByrWsBrG0rB8YQ9oA==
   dependencies:
     nanoid "^3.3.4"
     picocolors "^1.0.0"