Bump autoprefixer from 10.4.18 to 10.4.19

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.18 to 10.4.19.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.18...10.4.19)

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

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

package.json

@@ -38,7 +38,7 @@
         "@types/xmldom": "^0.1.34",
         "@webcomponents/webcomponentsjs": "^2.8.0",
         "@xmldom/xmldom": "^0.8.10",
-        "autoprefixer": "^10.4.18",
+        "autoprefixer": "^10.4.19",
         "copy-webpack-plugin": "^12.0.2",
         "copyfiles": "^2.4.1",
         "cross-env": "^7.0.3",