This is a maintenance release.
It is strongly recommended to update to v2.1.1 if v2.1.0 is being used, as it fixes a critical issue in the consumer (#980).
confluent-kafka-go is based on librdkafka v2.1.1, see the librdkafka v2.1.1 release notes for a complete list of changes, enhancements, fixes and upgrade considerations.