Bump postcss from 8.5.8 to 8.5.16

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.8 to 8.5.16.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.8...8.5.16)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.16
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package-lock.json

@@ -31,7 +31,7 @@
     "gulp-replace": "1.1.4",
     "gulp-sass": "5.1.0",
     "gulp-svgstore": "9.0.0",
-    "postcss": "8.5.8",
+    "postcss": "8.5.16",
     "postcss-csso": "6.0.1",
     "sass-embedded": "1.98.0"
   },