v2021.08.25

This release cooperates with librdkafka v1.7.0

• Support windows platform

• New interface for AdminClient

  • Admin::DeleteRecordsResult deleteRecords(const TopicPartitionOffsets& topicPartitionOffsets, std::chrono::milliseconds)

• Incremental cooperative rebalancing support for KafkaConsumer

  • I.e. partition.assignment.strategy=cooperative-sticky

• Unified Error type

  • No std::error_code (for interfaces) anymore

  • Type Error is convertible to std::error_code

• New interface for error notification

  • KafkaClient::setErrorCallback(std::function<void(const Error&)> errorCb)

• Fixed issue for KafkaConsumer

  • subscribe(...)/unsubscribe(...) returned too soon (before the "partition-rebalance events" being triggered)