Bump rack-cors to 0.4.1
Bump rack-cors to 0.4.1

Bumps [rack-cors](https://github.com/cyu/rack-cors) from 0.4.0 to 0.4.1.
- [Changelog](https://github.com/cyu/rack-cors/blob/master/CHANGELOG)
- [Commits](https://github.com/cyu/rack-cors/compare/v0.4.0...v0.4.1)
theodi/bothan,theodi/metrics-api,theodi/bothan,theodi/bothan,theodi/metrics-api,theodi/bothan,theodi/metrics-api