chore(deps-dev): update webpack-cli requirement in /src
chore(deps-dev): update webpack-cli requirement in /src

Updates the requirements on [webpack-cli](https://github.com/webpack/webpack-cli) to permit the latest version.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-cli/compare/webpack-cli@4.9.2...webpack-cli@4.10.0)

---
updated-dependencies:
- dependency-name: webpack-cli
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
h5bp/html5-boilerplate,h5bp/html5-boilerplate