chore(dependencies): Bump rack-test from 0.6.3 to 0.7.1
chore(dependencies): Bump rack-test from 0.6.3 to 0.7.1

Bumps [rack-test](https://github.com/rack-test/rack-test) from 0.6.3 to 0.7.1.
- [Changelog](https://github.com/rack-test/rack-test/blob/master/History.md)
- [Commits](https://github.com/rack-test/rack-test/compare/v0.6.3...v0.7.1)
mikemcquaid/HookHand