Bump webpack-dev-server from 4.15.1 to 5.0.1

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 4.15.1 to 5.0.1.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-dev-server/compare/v4.15.1...v5.0.1)

---
updated-dependencies:
- dependency-name: webpack-dev-server
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -58,7 +58,7 @@
     "xss": "^1.0.15"
   },
   "devDependencies": {
-    "webpack-dev-server": "^4.15.1"
+    "webpack-dev-server": "^5.0.1"
   },
   "babel": {
     "presets": [