Bump clean-css from 5.3.1 to 5.3.2

Bumps [clean-css](https://github.com/clean-css/clean-css) from 5.3.1 to 5.3.2.
- [Release notes](https://github.com/clean-css/clean-css/releases)
- [Changelog](https://github.com/clean-css/clean-css/blob/master/History.md)
- [Commits](clean-css/clean-css@v5.3.1...v5.3.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -44,7 +44,7 @@
     "yargs-parser": "^21.0.0"
   },
   "devDependencies": {
-    "clean-css": "^5.2.4",
+    "clean-css": "^5.3.3",
     "mem": "^9.0.2",
     "shelljs": "^0.8.5",
     "tar": ">=6.2.1",