fix: ignore custom property set

[alexander-akait]

No description provided.

[codecov-io]

Codecov Report

Merging #11 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #11      +/-   ##
==========================================
+ Coverage   99.62%   99.63%   +<.01%     
==========================================
  Files           2        2              
  Lines         270      275       +5     
  Branches       82       86       +4     
==========================================
+ Hits          269      274       +5     
  Misses          1        1

Impacted Files	Coverage Δ
test.js	100% <ø> (ø)	⬆️
index.js	99.59% <100%> (ø)	⬆️

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