build: es6 compatibiliy for commonjs bundle

[pi0]

🔗 Linked issue

#70

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR adds (semi) compatibility for commonjs entry

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

Merging #74 (013759c) into main (afd1489) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #74   +/-   ##
=======================================
  Coverage   84.95%   84.95%           
=======================================
  Files           7        7           
  Lines         319      319           
  Branches       30       30           
=======================================
  Hits          271      271           
  Misses         45       45           
  Partials        3        3