KafkaEx.ConsumerGroup starting suerpvisor tree - Supervisor.Spec.supervisor/2 is deprecated.

[cdesch]

When starting a supervisor tree from this example KafkaEx.ConsumerGroup, I get the deprecation warning:

warning: Supervisor.Spec.supervisor/2 is deprecated. Use the new child specifications outlined in the Supervisor module instead
  lib/cx/application.ex:31: Cx.Application.start/2

What should be used in place?

[Lechindianer]

@cdesch I guess you figured it out in the meantine yourself - in case anyone else stumbles upon this issue, see this MR: https://github.com/kafkaex/kafka_ex/pull/443