aiokafka 0.7.1

Bugfix release

on Python PyPI

Bugfixes:

• Allow group coordinator to close when all brokers are unavailable (issue #659
  and pr #660 by @dkilgore90)
• Exclude .so from source distribution to fix usage of sdist tarball
  (issue #681 and pr #684 by ods)
• Add dataclasses backport package to dependencies for Python 3.6
  (pr #690 by @ods)
• Fix initialization without running loop (issue #689 and pr #690 by @ods)
• Fix consumer fetcher for python3.9 (pr #672 by @dutradda)
• Make sure generation and member id are correct after (re)joining group.
  (issue #727 and pr #747 by @vangheem)

Deprecation:

• Add deprecation warning when loop argument to AIOKafkaConsumer and
  AIOKafkaProducer is passed. It's scheduled for removal in 0.8.0 as a
  preparation step towards upcoming Python 3.10 (pr #699 by @ods)

Improved Documentation:

• Update docs and examples to not use deprecated practices like passing loop
  explicitly (pr #693 by @ods)
• Add docstring for Kafka header support in Producer.send() (issue #566 and
  pr #650 by @andreportela)