Bump gulp-stylelint from 7.0.0 to 8.0.0 in /js

Bumps [gulp-stylelint](https://github.com/olegskl/gulp-stylelint) from 7.0.0 to 8.0.0.
- [Release notes](https://github.com/olegskl/gulp-stylelint/releases)
- [Commits](https://github.com/olegskl/gulp-stylelint/compare/7.0.0...8.0.0

)

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