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

@@ -59,7 +59,7 @@
   },
   "homepage": "https://github.com/movabletype/movabletype#readme",
   "devDependencies": {
-    "autoprefixer": "^10.4.16",
+    "autoprefixer": "^10.4.19",
     "clean-css-cli": "^5.6.2",
     "node-sass": "^9.0.0",
     "postcss-cli": "^11.0.0",