add AutoAck support for Server

server/subscriber.go

@@ -34,7 +34,10 @@ type subscriber struct {
 }
 
 func newSubscriber(topic string, sub interface{}, opts ...SubscriberOption) Subscriber {
-	var options SubscriberOptions
+	options := SubscriberOptions{
+		AutoAck: true,
+	}
+
 	for _, o := range opts {
 		o(&options)
 	}