Fix: memory storage copy data to avoid reference changes

[arthurfiorette]

Closes #163.

[codecov]

Codecov Report

Merging #164 (762d08b) into main (bb88a8b) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #164   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        17           
  Lines          495       511   +16     
  Branches       145       146    +1     
=========================================
+ Hits           495       511   +16     

Impacted Files	Coverage Δ
src/header/interpreter.ts	100.00% <ø> (ø)
src/storage/memory.ts	100.00% <100.00%> (ø)
src/util/update-cache.ts	100.00% <100.00%> (ø)
test/storage/storages.ts	100.00% <100.00%> (ø)

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