Cloudevents support for Segmentio/kafka-go library

[sravya-a]

Implement Kafka binding for segmentio/kafka-go library similar to what is done here: https://github.com/cloudevents/sdk-go/pull/314

[sravya-a]

Note: This is an enhancement request and I am up for adding this.

[wuhuizuo]

has any progress?

[sravya-a]

has any progress? Made some changes here: https://github.com/cloudevents/sdk-go/pull/719 I tested it locally it works as expected. I need to add some unit tests for sender.