Support AWS::ECS::Service ServiceRegistry

[fogonthedowns]

is AWS::ECS::Service ServiceRegistry supported?

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ecs-service-serviceregistry.html

I'd like to do something like this:

    "family": "MyTask",
    "serviceRegistries": [
        {
          "registryArn": "arn:aws:servicediscovery:us-hidden-n:hidden:service/srv-foo",
          "containerName": "bar-container",
          "containerPort": hidden
        }
    ],