Fix clearHashTable

[dchest]

clearHashTable cleared the shared hashTable instead of the argument

[codecov]

Codecov Report

Merging #6 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master       #6   +/-   ##
=======================================
  Coverage   93.73%   93.73%           
=======================================
  Files           3        3           
  Lines         351      351           
  Branches       45       45           
=======================================
  Hits          329      329           
  Misses         22       22

Impacted Files	Coverage Δ
lz4.js	91.69% <100%> (ø)	⬆️

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