Bump webpack-dev-server in /{{cookiecutter.project_slug}}

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 4.15.1 to 5.0.0.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v4.15.1...v5.0.0)

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

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

{{cookiecutter.project_slug}}/package.json

@@ -31,7 +31,7 @@
     "webpack": "^5.65.0",
     "webpack-bundle-tracker": "^3.0.1",
     "webpack-cli": "^5.0.1",
-    "webpack-dev-server": "^4.6.0",
+    "webpack-dev-server": "^5.0.0",
     "webpack-merge": "^5.8.0"
   },
   "engines": {