v2.0.2-1

• Support confluent-kafka v2.0.2
• New keywords:
  • List Groups
  • Delete Groups
  • Describe Groups
• New consumer group states can be accessed with global vars (see https://github.com/robooo/robotframework-ConfluentKafkaLibrary/blob/master/src/ConfluentKafkaLibrary/__init__.py#L92)
• Threaded consumer can be now closed correctly
• Many admin client keywords now returns full response
• Update of testing env + github actions
• Minor improvements & bugfixes