build(deps-dev): bump postcss from 8.5.3 to 8.5.8

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.3 to 8.5.8.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.3...8.5.8)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -106,7 +106,7 @@
     "husky": "^8.0.0",
     "mocha": "^10.8.2",
     "nodemon": "^2.0.22",
-    "postcss": "^8.4.31",
+    "postcss": "^8.5.8",
     "rimraf": "^3.0.2",
     "semantic-release": "^25.0.2",
     "sinon": "^15.0.3",