kafka-avro - keyruler version 
This is a fork of waldophotos/kafka-avro which intends to follow upstream with one major difference, that it is Promised based.
Why promises?
Most of this depends on the work we have done in keyruler-avsc. Because that library uses promise the serialize/deserialize data we neede to do these changes. The event system is basically the same since it's already async.
Ensure delivery
Since this libray uses Promises to tell the user when a message has been sent we might actually want to know that the message has been sent. To do this we use delivery-report in the background and return your promise when the report has been recieved. To use this you need to pass { ensureDelivery: true } to getProducer.
Example:
// kafkaAvro is an already initalized instance of KafkaAvro.
kafkaAvro.getProducer({...}, {...}, { ensureDelivery: true })
.then((producer) => producer.produce("topic", -1, {...}, "key"));