Bump autoprefixer from 10.4.16 to 10.4.19

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.16 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@10.4.16...10.4.19)

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

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

package.json

@@ -29,7 +29,7 @@
         "@wordpress/env": "8.7.0",
         "@wordpress/scripts": "26.19.0",
         "@wordpress/url": "3.49.0",
-        "autoprefixer": "10.4.16",
+        "autoprefixer": "10.4.19",
         "copy-webpack-plugin": "11.0.0",
         "cypress": "13.6.2",
         "cypress-real-events": "^1.11.0",