confluent-kafka-python v2.6.1

v2.6.1 is a maintenance release with the following fixes and enhancements:

• Removed python 3.6 support. (#1592)
• Migrated build system from setup.py to pyproject.toml in accordance with PEP 517 and PEP 518, improving project configuration, build system requirements management, and compatibility with modern Python packaging tools like pip and build. (#1592)
• Added an example for OAUTH OIDC producer with support for confluent cloud (#1769, @sarwarbhuiyan)

confluent-kafka-python is based on librdkafka v2.6.1, see the
librdkafka release notes
for a complete list of changes, enhancements, fixes and upgrade considerations.