perf(parser): cache nested tokens in Set to prevent deoptimization

[JiLiZART]

No description provided.

[codecov]

Codecov Report

Merging #83 (db44a11) into master (70ff2e6) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #83      +/-   ##
==========================================
+ Coverage   93.63%   93.65%   +0.02%     
==========================================
  Files          15       15              
  Lines         597      599       +2     
  Branches      135      135              
==========================================
+ Hits          559      561       +2     
  Misses         32       32              
  Partials        6        6              

Impacted Files	Coverage Δ
packages/bbob-parser/src/parse.js	94.73% <100.00%> (+0.11%)	⬆️

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