Bump stylelint-config-standard from 19.0.0 to 20.0.0
Bump stylelint-config-standard from 19.0.0 to 20.0.0

Bumps [stylelint-config-standard](https://github.com/stylelint/stylelint-config-standard) from 19.0.0 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](https://github.com/stylelint/stylelint-config-standard/compare/19.0.0...20.0.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
mistic100/Photo-Sphere-Viewer,mistic100/Photo-Sphere-Viewer,mistic100/Photo-Sphere-Viewer