Bump rack from 1.6.0 to 1.6.11
Bump rack from 1.6.0 to 1.6.11

Bumps [rack](https://github.com/rack/rack) from 1.6.0 to 1.6.11.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rack/rack/compare/1.6.0...1.6.11)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
ahayworth/lita-corporate-bs-generator