fix: issue where duplicating shorthand and longhand class/id

[DylanPiercey]

resolves #15

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.08 🎉

Comparison is base (6678784) 91.06% compared to head (fc1d4dc) 91.14%.

❗ Current head fc1d4dc differs from pull request most recent head fc6662c. Consider uploading reports for the commit fc6662c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #26      +/-   ##
==========================================
+ Coverage   91.06%   91.14%   +0.08%     
==========================================
  Files          11       11              
  Lines         414      418       +4     
  Branches      124      126       +2     
==========================================
+ Hits          377      381       +4     
  Misses         17       17              
  Partials       20       20              

Impacted Files	Coverage Δ
src/constants.ts	100.00% <ø> (ø)
src/index.ts	89.43% <100.00%> (+0.18%)	⬆️

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[github-actions]

🎉 This PR is included in version 1.4.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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