Make SCRAM-SHA-256/512 SASL Mechanisms available.

[forsberg]

Fixes robinhood/faust#601.

Description

Please describe your pull request.

Makes SCRAM-SHA-256/SCRAM-SHA-512 SASL Mechanisms available.

Tested against a Kafka 2.5.0 cluster with success.

[codecov-io]

Codecov Report

Merging #29 (4d4f675) into master (40237be) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #29   +/-   ##
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  Coverage   63.96%   63.96%           
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  Files          99       99           
  Lines       10272    10272           
  Branches     1153     1153           
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  Hits         6570     6570           
  Misses       3547     3547           
  Partials      155      155           

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[patkivikram]

Were you able to test this using aiokafka==0.7.0 and faust-streaming with your changes?

[patkivikram]

I see your comment about testing.