add deflateReset

[folkertdev]

closes #59

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (cedb3cb) 87.71% compared to head (a130f89) 87.66%.

Files	Patch %	Lines
libz-rs-sys/src/lib.rs	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
- Coverage   87.71%   87.66%   -0.06%     
==========================================
  Files          33       33              
  Lines        8053     8058       +5     
==========================================
  Hits         7064     7064              
- Misses        989      994       +5     

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