fix code signing for release. set deployment target to 7.1
fix code signing for release. set deployment target to 7.1

rnplay/rnplay-ios,soliury/rnplay-ios,rnplay/rnplay-ios,bradparks/react-native-playground-native,bradparks/react-native-playground-native,SidBala/rnplay-ios,rnplay/rnplay-ios,SidBala/rnplay-ios,bradparks/react-native-playground-native,soliury/rnplay-ios,SidBala/rnplay-ios,SidBala/rnplay-ios,soliury/rnplay-ios,soliury/rnplay-ios