Expose logger

[Nevon]

I'm currently building a "plugin" that wraps around consumer.eachMessage. In some cases, I would like to log some information. At the moment, the user needs to provide the logger to the plugin, but I would rather be able to get KafkaJS's logger from the consumer or producer, so that I can log "as" kafkajs (in the same format, following the same log level settings).

For example:

const client = new Kafka({ ... })

const consumer = kafka.consumer({ ... })
const consumerLogger = consumer.logger()

const producer = kafka.producer({ ... })
const producerLogger = producer.logger()