Add more files to npm distribution

[lukastaegert]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

At the moment, both the browser esm build as well as the generated sourcemaps are not published to npm. This will change the configuration to include those files as well.

[shellscape]

Doesn't appear to have any negative consequences. Does it solve a particular issue?

[lukastaegert]

Mainly that we have been building an ESM browser build for quite some time but forgot to publish it. And I guess the source maps that had been created but were not delivered do not hurt as well.

[guybedford]

And I guess the source maps that had been created but were not delivered do not hurt as well.

It seems like the source maps will increase the package download size by around 4MB, which may not be ideal I think?

Also I'm not sure the debugging experience is necessarily improved by having the source maps included? It's pretty standard for built libraries to not bundle their source maps. If we turned them off entirely that would even give us faster builds?

[lukastaegert]

Good point regarding performance but I think the main time-sink is typescript and minification of the browser bundle at the moment. And I guess finding error locations in tests will be more difficult? I will play around with this a little.

I did not check the size of the source maps. Yes, more than doubling the size of our generated package is probably not ideal. Will change this to only add the browser build.

[lukastaegert]

Ok

• removed sourcemaps from bundle
• only generate sourcemaps where they actually help us in tests
• switch the browser extension from mjs to es.js. I originally preferred mjs but I feel it is just very inconsistent (and no breaking change since it was not part of the bundle orignally)
• use patterns in file property so that we do not miss files in the future