Unicode ligatures and combining characters not displaying properly

[claysmalley]

Many South and Southeast Asian scripts make frequent use of ligatures and combining characters, which are not rendering properly. Examples of Oriya, Khmer and Dzongkha below:

There are problems with ligatures and combining characters in all of the above screenshots, but that seems to be downstream of maplibre/maplibre-gl-js#50.

Originally posted by @claysmalley in #801 (comment)

[1ec5]

I have a proof of concept for a fix in 1ec5/maplibre-gl-js#1. It needs a bit of cleanup and requires some major changes to How Things Have Always Been Done, so it’ll need some discussion before I can formally move forward with it.