chore(deps-dev): bump webpack-manifest-plugin in /superset-frontend

Bumps [webpack-manifest-plugin](https://github.com/shellscape/webpack-manifest-plugin) from 2.2.0 to 4.0.2.
- [Release notes](https://github.com/shellscape/webpack-manifest-plugin/releases)
- [Commits](shellscape/webpack-manifest-plugin@v2.2.0...v4.0.2)

---
updated-dependencies:
- dependency-name: webpack-manifest-plugin
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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