Move minimum zip requirement to Xcode 12.0 (#7013)
Move minimum zip requirement to Xcode 12.0 (#7013)

Needed for arm64 simulator support.
firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk