Bumps [debug](https://github.com/debug-js/debug) to 2.6.9 and updates ancestor dependencies [debug](https://github.com/debug-js/debug), [gulp-mocha](https://github.com/sindresorhus/gulp-mocha) and [mocha](https://github.com/mochajs/mocha). These dependencies need to be updated together.
Updates `debug` from 2.2.0 to 2.6.9 - [Release notes](https://github.com/debug-js/debug/releases) - [Changelog](https://github.com/debug-js/debug/blob/2.6.9/CHANGELOG.md) - [Commits](https://github.com/debug-js/debug/compare/2.2.0...2.6.9)
Updates `gulp-mocha` from 2.2.0 to 8.0.0 - [Release notes](https://github.com/sindresorhus/gulp-mocha/releases) - [Commits](https://github.com/sindresorhus/gulp-mocha/compare/v2.2.0...v8.0.0)
Updates `mocha` from 2.4.5 to 10.2.0 - [Release notes](https://github.com/mochajs/mocha/releases) - [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md) - [Commits](https://github.com/mochajs/mocha/compare/v2.4.5...v10.2.0)