Version 9.0 (#9595)

FirebaseCoreExtension.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
     s.name             = 'FirebaseCoreExtension'
-    s.version          = '8.15.0'
+    s.version          = '9.0.0'
     s.summary          = 'Extended FirebaseCore APIs for Firebase product SDKs'
 
     s.description      = <<-DESC
@@ -28,5 +28,5 @@ Pod::Spec.new do |s|
     s.source_files = 'FirebaseCore/Extension/*.[hm]'
     s.public_header_files = 'FirebaseCore/Extension/*.h'
 
-    s.dependency 'FirebaseCore', '~> 8.12'
+    s.dependency 'FirebaseCore', '~> 9.0'
   end