Bump webpack-dev-server from 3.7.2 to 3.8.0 Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 3.7.2 to 3.8.0. - [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/v3.7.2...v3.8.0) Signed-off-by: dependabot-preview[bot]