Add compression for values

[Krukov]

#301

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 96.05263% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.12%. Comparing base (9d2c510) to head (47b5101).

Files with missing lines	Patch %	Lines
cashews/compresors.py	95.34%	1 Missing and 1 partial ⚠️
cashews/backends/interface.py	66.66%	1 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #358      +/-   ##
==========================================
+ Coverage   94.11%   94.12%   +0.01%     
==========================================
  Files          54       55       +1     
  Lines        3602     3662      +60     
  Branches      462      464       +2     
==========================================
+ Hits         3390     3447      +57     
- Misses        135      137       +2     
- Partials       77       78       +1     

Flag	Coverage Δ
unittests	94.04% <96.05%> (+0.01%)	⬆️

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