Bump stylelint and stylelint-config-standard

Bumps [stylelint](https://github.com/stylelint/stylelint) and [stylelint-config-standard](https://github.com/stylelint/stylelint-config-standard). These dependencies needed to be updated together.

Updates `stylelint` from 7.13.0 to 13.2.0
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/master/CHANGELOG.md)
- [Commits](stylelint/stylelint@7.13.0...13.2.0)

Updates `stylelint-config-standard` from 16.0.0 to 20.0.0
- [Release notes](https://github.com/stylelint/stylelint-config-standard/releases)
- [Changelog](https://github.com/stylelint/stylelint-config-standard/blob/master/CHANGELOG.md)
- [Commits](stylelint/stylelint-config-standard@16.0.0...20.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>