One could peruse CircleCI, which has the ssh feature built-in, and also the widest support of macOS versions x Xcode combinations. All others CI providers are

One could peruse CircleCI, which has the ssh feature built-in, and also the widest support of macOS versions x Xcode combinations. All others CI providers are content with Y and Y-1 versions (at best) and seem squarely focused on build-for-iOS CI (Including Travis is hopelessly slow, when it’s not outright broken)