Bump rack-cors from 1.0.3 to 1.0.5
Bump rack-cors from 1.0.3 to 1.0.5

Bumps [rack-cors](https://github.com/cyu/rack-cors) from 1.0.3 to 1.0.5.
- [Release notes](https://github.com/cyu/rack-cors/releases)
- [Changelog](https://github.com/cyu/rack-cors/blob/master/CHANGELOG.md)
- [Commits](https://github.com/cyu/rack-cors/compare/v1.0.3...v1.0.5)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
atomicjolt/lti_starter_app,atomicjolt/lti_starter_app,atomicjolt/adhesion,atomicjolt/lti_starter_app,atomicjolt/lti_starter_app,atomicjolt/adhesion,atomicjolt/adhesion,atomicjolt/adhesion