Update to use xcode 10.1 [ci skip]
Update to use xcode 10.1 [ci skip]

proversity-org/edx-app-ios,proversity-org/edx-app-ios,proversity-org/edx-app-ios,proversity-org/edx-app-ios,proversity-org/edx-app-ios,proversity-org/edx-app-ios