chore(deps): bump js-yaml and css-loader

Bumps [js-yaml](https://github.com/nodeca/js-yaml) to 3.14.1 and updates ancestor dependency [css-loader](https://github.com/webpack-contrib/css-loader). These dependencies need to be updated together.


Updates `js-yaml` from 3.7.0 to 3.14.1
- [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md)
- [Commits](nodeca/js-yaml@3.7.0...3.14.1)

Updates `css-loader` from 0.28.11 to 6.8.1
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/css-loader@v0.28.11...v6.8.1)

---
updated-dependencies:
- dependency-name: js-yaml
  dependency-type: indirect
- dependency-name: css-loader
  dependency-type: direct:development
...

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