fix(app, ios): adopt firebase-ios-sdk 12.1.0

Author: mikehardy

docs/index.md

@@ -335,7 +335,7 @@ Open your projects `/ios/Podfile` and add any of the globals shown below to the
 
 ```ruby
 # Override Firebase SDK Version
-$FirebaseSDKVersion = '12.0.0'
+$FirebaseSDKVersion = '12.1.0'
 ```
 
 Once changed, reinstall your projects pods via pod install and rebuild your project with `npx react-native run-ios`.

packages/app/package.json

@@ -74,7 +74,7 @@
   },
   "sdkVersions": {
     "ios": {
-      "firebase": "12.0.0",
+      "firebase": "12.1.0",
       "iosTarget": "15.0",
       "macosTarget": "10.15",
       "tvosTarget": "15.0"