Improvements

- Adding groups support for external testers (#6829)
- Allow `produce` to enable/disable additional services (apple-pay, game-center, in-app-purchase, sirikit)
- Add update check to ensure people are running the latest release (#6800)
- Show instructions on how to solve common TestFlight error (#6766)
- Replace step with factor, so that users that use CMD F find it either way (#6762)
- Add `SPACESHIP_TIMEOUT` environment variable to change the default timeout (#6712)

https://github.com/fastlane-old/spaceship/releases/tag/0.37.0
