Note that the "Build All" phase and standalone build scripts still target Xcode 9.2's simulators, and should probably stay that way until we start building on Xcode 9.3 and CircleCI 2.0.
@jvisenti I threw a CircleCI 2.0 update on here, based on the update I just did on BonMot. It's pretty slick, and I think I've worked out all (?) of the kinks.
Note that the "Build All" phase and standalone build scripts still target Xcode 9.2's simulators, and should probably stay that way until we start building on Xcode 9.3 and CircleCI 2.0.