remove lib from the final package

[gimmyxd]

This was a remnant from the initial package, before we switched to tsc and support commonjs.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.64%. Comparing base (b341f1f) to head (2b824bd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #119   +/-   ##
=======================================
  Coverage   87.64%   87.64%           
=======================================
  Files          31       31           
  Lines         979      979           
  Branches      270      264    -6     
=======================================
  Hits          858      858           
- Misses        120      121    +1     
+ Partials        1        0    -1     

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