Add support for COMMAND LIST

[dvora-h]

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• Does $ tox pass with this change (including linting)?
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Description of change

closes #1948

[codecov-commenter]

Codecov Report

Merging #2149 (a830157) into master (fa7b3f6) will decrease coverage by 0.05%.
The diff coverage is 20.00%.

@@ Coverage Diff @@ ## master #2149 +/- ## ========================================== - Coverage 92.27% 92.22% -0.06%  ========================================== Files 105 105 Lines 25246 25266 +20 ========================================== + Hits 23297 23302 +5  - Misses 1949 1964 +15 

Impacted Files	Coverage Δ
redis/commands/core.py	83.28% <9.09%> (-0.47%)	⬇️
tests/test_commands.py	91.83% <33.33%> (-0.17%)	⬇️
redis/asyncio/connection.py	84.72% <0.00%> (-0.12%)	⬇️
tests/test_asyncio/test_search.py	98.68% <0.00%> (+0.32%)	⬆️

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[chayim]

@dvora-h let me know what you think about the style change. I think it reads cleaner.

[dvora-h]

It's realy better, I changed it.