Update rack-test requirement to ~> 1.0
Update rack-test requirement to ~> 1.0

Updates the requirements on [rack-test](https://github.com/rack-test/rack-test) to permit the latest version.
- [Release notes](https://github.com/rack-test/rack-test/releases)
- [Changelog](https://github.com/rack-test/rack-test/blob/master/History.md)
- [Commits](https://github.com/rack-test/rack-test/commits/v1.0.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
DannyBen/madness,DannyBen/madness,DannyBen/madness