Bump sass-loader from 12.6.0 to 13.0.0 (#576)

Bump sass-loader from 12.6.0 to 13.0.0 (#576)

Bumps [sass-loader](https://github.com/webpack-contrib/sass-loader) from 12.6.0 to 13.0.0.
- [Release notes](https://github.com/webpack-contrib/sass-loader/releases)
- [Changelog](https://github.com/webpack-contrib/sass-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/sass-loader/compare/v12.6.0...v13.0.0)

---
updated-dependencies:
- dependency-name: sass-loader
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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