Bumps [debug](https://github.com/visionmedia/debug) from 2.6.8 to 2.6.9. **This update includes security fixes.** - [Release notes](https://github.com/visionmedia/debug/releases) - [Changelog](https://github.com/visionmedia/debug/blob/2.6.9/CHANGELOG.md) - [Commits](https://github.com/visionmedia/debug/compare/2.6.8...2.6.9)