Bump autoprefixer from 10.3.7 to 10.4.0

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.3.7 to 10.4.0.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.3.7...10.4.0)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -18,7 +18,7 @@
   "devDependencies": {
     "@fortawesome/fontawesome-free": "^5.15.4",
     "archiver": "^5.3.0",
-    "autoprefixer": "^10.3.7",
+    "autoprefixer": "^10.4.0",
     "cssnano": "^5.0.8",
     "postcss": "^8.3.11",
     "postcss-cli": "^9.0.1",