Mathjax.Hub not in v3

[davidfarmer]

There are at least a half-dozen places where this needs to change for MathJax version 3:

Date: Wed, 5 Feb 2020 15:58:09 -0500
From: Davide Cervone [email protected]
Reply-To: [email protected]
To: "[email protected]" [email protected]
Subject: Re: [mathjax-users] Adding typeset to queue isn't updating variable
Parts/Attachments:
1 OK ~42 lines Text
2 Shown ~49 lines Text

The API has changed for MathJax v3, and there is no longer a MathJax.Hub.  See
http://docs.mathjax.org/en/latest/web/typeset.html [docs.mathjax.org]

for details about the v3 typesetting calls.

Davide