[google_maps_flutter] Add missing depencency override

Author: jokerttu

packages/google_maps_flutter/google_maps_flutter/example/pubspec.yaml

@@ -19,6 +19,7 @@ dependencies:
     # the parent directory to use the current plugin's version.
     path: ../
   google_maps_flutter_android: ^2.1.10
+  google_maps_flutter_ios: ^2.1.10
   google_maps_flutter_platform_interface: ^2.2.1
 
 dev_dependencies:
@@ -42,5 +43,7 @@ dependency_overrides:
     path: ../../../google_maps_flutter/google_maps_flutter
   google_maps_flutter_android:
     path: ../../../google_maps_flutter/google_maps_flutter_android
+  google_maps_flutter_ios:
+    path: ../../../google_maps_flutter/google_maps_flutter_ios
   google_maps_flutter_platform_interface:
     path: ../../../google_maps_flutter/google_maps_flutter_platform_interface