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New features:
* Add codec for ZStandard compression (KIP-110) (pr 801)
* Add basic admin client functionality (pr 811 started by gabriel-tincu)
* Drop support for Python 3.6, add support and pre-built packages for Python
3.10 (pr 841)
Bugfixes:
* Fix `KeyError` on solitary abort marker (issue 781, pr 782 by pikulmar)
* Fix handling unsupported compression codec (issue 795)
* Handled other SASL mechanism in logging (issue 852, pr 861 by mangin)
Improved Documentation:
* Fix documentation on how to install optional features (issue 645)
* Improve the rendering of the documentation (pr 722 by multani)
* Fix `MyRebalancer` example in `docs/consumer.rst` (pr 731 by aamalev)