Publish to NPM

Hi!

First of all: thank you for creating this project!

I am a maintainer of the upcoming GDScript track in [Exercism](https://exercism.org/tracks). In order to get the highlighting working in our online editor, we need a highlightjs module available as an NPM package. AFAIK currently this repo is not published, so, as a workaround, I forked it and published a [scoped version](https://www.npmjs.com/package/@pfertyk/highlightjs-gdscript).

Are there any plans to make the original version available in NPM?

Cheers,
Paweł