Mojtaba Samimi

I think `maplibre` styles looks OK. @birkskyum Please check them using ```sh npm run strict ``` instead of ```sh npm start ``` Thank you!

> Yes, maplibre appears to be alright, it's only the mapbox traces that are affected by this PR. Thanks @birkskyum for testing. @martian111 FYI - we don't have to try...

> * Instead of making this a separate trace type, could/should it be a subtype of `treemap` and accessed (for example) via `vornoi=True`? Mostly just playing devil's advocate here but...

> * The multiple levels of hierarchy sort of blend together visually -- for example, the blue and orange regions below each blend together into a single unit even though...

> if there's no real plans to update to the newer version of d3, is there some recommendation for users to still end up with a ISO8601 weeknum (%V)? This...

A table of `d3-v3` methods applied in current plotly.js. The +/- sign indicates that an equivalent v5 sub-module found and could possibly be replaced. ``` - d3.behavior + d3.dispatch +...

:tada: and now d3-v6 is out: https://observablehq.com/d/f91cccf0cad5e9cb

@gvwilson This requires extra refactoring. Let's keep it open.

> Doesn't the move to esbuild mean we _have_ to get rid of `require()` ? No. We don't have to.

> 👍 How many more days of work do you think it will be to remove `require()` when the time comes? I think not only the `require` calls should be...