Use variables for deployment targets
Use variables for deployment targets

Signed-off-by: Peter Friese <4b8373d016f277527198385ba72fda0feb5da015@peterfriese.de>

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