Bump postcss and autoprefixer in /Build

Bumps [postcss](https://github.com/postcss/postcss) to 8.4.31 and updates ancestor dependency [autoprefixer](https://github.com/postcss/autoprefixer). These dependencies need to be updated together.


Updates `postcss` from 8.4.24 to 8.4.31
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.24...8.4.31)

Updates `autoprefixer` from 9.8.8 to 10.4.16
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@9.8.8...10.4.16)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: indirect
- dependency-name: autoprefixer
  dependency-type: direct:development
...

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

Author: dependabot[bot]

Build/package-lock.json

@@ -13,7 +13,7 @@
 		"@babel/core": "^7.22.5",
 		"@babel/preset-env": "^7.22.5",
 		"@babel/register": "^7.22.5",
-		"autoprefixer": "^9.8.8",
+		"autoprefixer": "^10.4.16",
 		"gulp": "^4.0.2",
 		"gulp-babel": "^8.0.0",
 		"gulp-jshint": "^2.1.0",