Bumps [rack](https://github.com/rack/rack) from 1.5.2 to 1.6.13.
- [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/1.5.2...1.6.13)
Signed-off-by: dependabot[bot] <support@github.com>
multi_json (~> 1.3)
multi_xml (~> 0.5)
rack (~> 1.2)
multi_json (~> 1.3)
multi_xml (~> 0.5)
rack (~> 1.2)
shorturl (1.0.0)
thread_safe (0.2.0)
atomic (>= 1.1.7, < 2)
shorturl (1.0.0)
thread_safe (0.2.0)
atomic (>= 1.1.7, < 2)