[MathOnWeb] reminder: meeting May 10

Hi everyone,

Just a quick reminder that we're meeting on May 10 at noon Eastern time at
the new Google Meet URL [1] (no Google account required, phone dial-in
supported).

Agenda items are listed below -- feel free to add here or later.

Best,
Peter.

[1] https://github.com/w3c/mathonwebpages/wiki#dial-in-information

# Agenda

* update on TPAC 2018
* update on Arno's json proposal
* updates from CSS TF