Add sorted set functions to RedisCache

[Nazhixx]

No description provided.

[codecov]

Codecov Report

Merging #673 (d303159) into master (0756a8b) will increase coverage by 23.6%.
The diff coverage is 37.5%.

@@            Coverage Diff            @@
##           master    #673      +/-   ##
=========================================
+ Coverage    60.0%   83.6%   +23.6%     
=========================================
  Files          39      21      -18     
  Lines        2534    1181    -1353     
  Branches       69       0      -69     
=========================================
- Hits         1520     987     -533     
+ Misses       1001     194     -807     
+ Partials       13       0      -13     

Flag	Coverage Δ
mypy	?
tests	83.6% <37.5%> (-5.9%)	⬇️

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Impacted Files	Coverage Δ
django_redis/client/default.py	75.2% <20.0%> (-15.2%)	⬇️
django_redis/cache.py	90.3% <66.7%> (-7.4%)	⬇️

... and 28 files with indirect coverage changes

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[WisdomPill]

nice effort but I see no tests nor changelog and I am afraid that without those this PR can't be merged