Migrates CI to use Xcode 11.6 and removes Xcode 10 testing since 11 is required for App Store submission. (#1613)
Migrates CI to use Xcode 11.6 and removes Xcode 10 testing since 11 is required for App Store submission. (#1613)


stripe/stripe-ios,stripe/stripe-ios,stripe/stripe-ios,stripe/stripe-ios,stripe/stripe-ios,stripe/stripe-ios