* DEV: Add test case for syntax highlight of complex HTML
The commit 685e0da upgrade HighlightJS to version 11, which deprecates
syntax highlight of complex HTML elements. See https://github.com/highlightjs/highlight.js/issues/2889
This brought a regression of syntax highlighting of GitHub oneboxes,
which was fixed in 09cec7d. This commit adds a test case to prevent
future regressions like this one.
* fix test and warning
Highlight.js changed their default branch from master to main. This switches to the @highlightjs/cdn-assets package, thus sidestepping the problem. It's a slightly cleaner integration though (no need to build locally anymore).
We updated version of moment and moment-timezone as our current versions are outdated making Discourse Dates broken on places where timezone had updates, like here in Brazil.
This also update highlightJS to the latest version and corrected a test that relied on a no longer supported locale in
moment.
Some definitions rely on others, in particular the c/cpp/c-like ones,
and we were appending the bundle of all files in the folder.
Instead for testing I've limited us to just three definitions. This has
the benefit of being a lot smaller to download/parse in test mode too.
Moves Highlight.js files to vendor/assets/javascripts
Adds Highlight.js in yarn package management
Removes old rake task and reliance on NPM to build Highlight.js
Highlight.js is now integrated in the "javascript:update" rake task
