add deflate::prime

[folkertdev]

closes #65

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 88.01%. Comparing base (c7d01d3) to head (57874e2).

Files	Patch %	Lines
zlib-rs/src/deflate.rs	93.54%	2 Missing ⚠️
libz-rs-sys/src/lib.rs	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #66      +/-   ##
==========================================
+ Coverage   87.94%   88.01%   +0.07%     
==========================================
  Files          34       34              
  Lines        8488     8522      +34     
==========================================
+ Hits         7465     7501      +36     
+ Misses       1023     1021       -2     

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