fix(js/ts) Float32Array higlighted incorrectly

[joshgoebel]

Changes

Resolves #3252.

• Improves the class name detection regex to handle more cases like Float32Array or CSSParser

Checklist

• Added markup tests, or they don't apply here because...
• Updated the changelog at CHANGES.md

[allejo]

This seems sane enough to me. The only notable exception to this would be the JSON object that is treated as a constant (which, isn't too far from the truth I guess).

[joshgoebel]

The only notable exception to this would be the JSON object

I may go ahead and hard-code that as an exception to the constant rule. :-) I think that makes sense for a core library class.