move firebase-ios-sdk to dependency
move firebase-ios-sdk to dependency

ceisinger/cordova-plugin-firebase,DigitalsunrayMedia/cordova-plugin-firebase,arnesson/cordova-plugin-firebase,DigitalsunrayMedia/cordova-plugin-firebase,arnesson/cordova-plugin-firebase,arnesson/cordova-plugin-firebase,ceisinger/cordova-plugin-firebase,DigitalsunrayMedia/cordova-plugin-firebase,ceisinger/cordova-plugin-firebase,ceisinger/cordova-plugin-firebase,arnesson/cordova-plugin-firebase