chore(deps-dev): bump autoprefixer from 9.7.0 to 9.7.4

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.7.0 to 9.7.4.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/autoprefixer/compare/9.7.0...9.7.4)

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

package.json

@@ -24,7 +24,7 @@
     "@types/d3": "^5.7.2",
     "@types/react": "^16.9.22",
     "@types/react-dom": "^16.9.4",
-    "autoprefixer": "^9.7.0",
+    "autoprefixer": "^9.7.4",
     "babel-loader": "^8.0.6",
     "babel-preset-react-app": "^9.0.2",
     "cypress": "^3.6.1",