[imsc] Pull Request: Update WCAG reference to WCAG 2.1

palemieux has just submitted a new pull request for https://github.com/w3c/imsc:

== Update WCAG reference to WCAG 2.1 ==
Closes #465

See https://github.com/w3c/imsc/pull/481

Received on Thursday, 4 July 2019 22:12:17 UTC