Minor:
- Add Kafka headers to message metadata (https://github.com/fyndiq/confluent_kafka_helpers/pull/44)
- Enable producer idempotency by default (https://github.com/fyndiq/confluent_kafka_helpers/pull/42)
- Raise exceptions on Kafka errors instead of just logging them (https://github.com/fyndiq/confluent_kafka_helpers/pull/41)