Milestone

This PR fixes #18, and it also ensures consistent numbering when adding or removing modules.

Getting there

I wrote a incrementAndLinkify function that is able to operate on a set of HTML nodes. This code is then used both in the Netlify function download-license.js and in a new web component IncrementedLinks.

In the tests and in the Netlify function we use the JSDOM library to simulate a browser. This allows incrementAndLinkify to be agnostic about where the nodes come from.
I have previously been able to get away without a build step for the JavaScript, until now, I had to include esbuild to convert the incrementAndLinkify from ES6 to commonjs so that it could be included in the Netlify handler.
I also tried converting the Netlify function to ES6 before I realized that I presently use require('') to include the license as .json . So I had to give up converting the Netlify function to an ES6 module. Maybe we can convert this function to ES6 in the future by changing how we make the license text available. 💭
Lastly, I'd say that this was a real browser-API adventure. I learnt a lot. 😄

Play around with the in-browser functionality and see if there are bugs with the numbering functionality.
Have a look at the incrementAndLinkify code and the tests. I have tried to document them sufficiently. However, feel free to try and improve the documentation.

After merging, this PR should allow us to: