Bumps [commander](https://github.com/tj/commander.js) from 2.15.1 to 2.19.0.
- [Release notes](https://github.com/tj/commander.js/releases)
- [Changelog](https://github.com/tj/commander.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tj/commander.js/compare/v2.15.1...v2.19.0)
Signed-off-by: dependabot[bot] <support@dependabot.com>