Build system upgrade

[serbanghita]

• Build system now uses Chrome Headless
• Improved karma support for development
• Tests use the sources from /src/ instead of /bin/
• Test coverage uses Istanbul for a better future development process.

Signed-off-by: Serban Ghita serbanghita@gmail.com

[serbanghita]

@prettymuchbryce this will offer a better transition to convert the script to Typescript in the near future. Also we can write tests for new features in this upgraded env. Let me know your thoughts!

[prettymuchbryce]

Thanks for this contribution. Chrome headless and a dev script is a really nice quality of life improvement.

This project could really use some TLC. It's past due to be converted to TypeScript along with generating both ESM and CJS bundles. These things should probably happen as part of a 1.0.0 release.

This change reminds me that there is room for improvement on test coverage as well.

=============================== Coverage summary ===============================
Statements   : 89.22% ( 240/269 )
Branches     : 86.55% ( 148/171 )
Functions    : 68.57% ( 24/35 )
Lines        : 88.58% ( 225/254 )
================================================================================

[serbanghita]

Thanks for this contribution. Chrome headless and a dev script is a really nice quality of life improvement.

💯

This change reminds me that there is room for improvement on test coverage as well.

Yes, basically if we want new features and fixes, we need a good way to see the coverage.
This needs integration into a public CI like https://travis-ci.org/

[prettymuchbryce]

Thanks again @serbanghita! I really appreciate these improvements.