chore(deps-dev): bump webpack-dev-server in /test/dummy

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 4.13.1 to 5.2.1.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/main/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v4.13.1...v5.2.1)

---
updated-dependencies:
- dependency-name: webpack-dev-server
  dependency-version: 5.2.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

test/dummy/package.json

@@ -35,6 +35,6 @@
     "@pmmmwh/react-refresh-webpack-plugin": "^0.5.7",
     "babel-plugin-transform-react-remove-prop-types": "^0.4.24",
     "react-refresh": "^0.13.0",
-    "webpack-dev-server": "^4.9.2"
+    "webpack-dev-server": "^5.2.1"
   }
 }