Bump webpack-dev-server from 3.11.2 to 4.0.0

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 3.11.2 to 4.0.0.
- [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/v3.11.2...v4.0.0)

---
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

@@ -76,7 +76,7 @@
   "vue-template-compiler": "^2.6.14",
   "webpack": "^5.50.0",
   "webpack-cli": "^4.8.0",
-  "webpack-dev-server": "^3.11.2",
+  "webpack-dev-server": "^4.0.0",
   "webpack-pwa-manifest": "^4.3.0"
  },
  "lint-staged": {