Kafka 2.2.1 - Confluent 5.2.2
upgrade: bump kafka to 2.2.1 and confluent to 5.2.2 (#55) * upgrade: kafka to 2.2.1 and confluent to 5.2.2 * Update README.md
upgrade: bump kafka to 2.2.1 and confluent to 5.2.2 (#55) * upgrade: kafka to 2.2.1 and confluent to 5.2.2 * Update README.md