Consider adding .npmignore file

[hakubo]

Hey,

I am a happy user of your library, but as my project grows we have a lot of dependencies.
We could save a lot of space if you added .npmignore file to your project.

I even found tool that can help you with it: https://github.com/inikulin/dmn

Thanks!

[panuhorsmalahti]

That's a fair point, but 17KiB is not that much. I'll see if I'll do it tomorrow anyway.

[panuhorsmalahti]

Fixed in 1.3.1.