RedisJSON 2.0.4 behaviour support

[chayim]

Unit tests only, to validate behaviour in RedisJSON 2.0.4 did not break the library

[codecov-commenter]

Codecov Report

Merging #1747 (e8bcdcb) into master (64791a5) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1747   +/-   ##
=======================================
  Coverage   89.04%   89.04%           
=======================================
  Files          53       53           
  Lines       11051    11052    +1     
=======================================
+ Hits         9840     9841    +1     
  Misses       1211     1211           

Impacted Files	Coverage Δ
tests/test_timeseries.py	100.00% <ø> (ø)
tests/conftest.py	92.25% <100.00%> (ø)
tests/test_json.py	100.00% <100.00%> (ø)

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