Bump webpack-dev-server from 4.15.2 to 5.2.1

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 4.15.2 to 5.2.1.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v4.15.2...v5.2.1)

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

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

Author: dependabot[bot]

package.json

@@ -307,7 +307,7 @@
     "webpack-assets-manifest": "^4.0.6",
     "webpack-bundle-analyzer": "4.10.2",
     "webpack-cli": "4.10.0",
-    "webpack-dev-server": "4.15.2"
+    "webpack-dev-server": "5.2.1"
   },
   "resolutions": {
     "html-webpack-plugin": "4.5.2",