fix: duplication class name with ignore case.

[AxiosLeo]

No description provided.

[codecov-io]

Codecov Report

Merging #72 (21b4222) into master (f9c1f66) will increase coverage by 0.01%.
The diff coverage is 92.30%.

@@            Coverage Diff             @@
##           master      #72      +/-   ##
==========================================
+ Coverage   94.27%   94.28%   +0.01%     
==========================================
  Files          15       15              
  Lines        2322     2327       +5     
==========================================
+ Hits         2189     2194       +5     
  Misses        133      133              

Impacted Files	Coverage Δ
src/langs/php/combinator.js	90.34% <92.30%> (-0.07%)	⬇️
src/lib/helper.js	84.55% <0.00%> (+0.81%)	⬆️

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