[imsc] Pull Request: Add tts:textShadow to HRM glyph definition

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

== Add tts:textShadow to HRM glyph definition ==
Closes #405 

See https://github.com/w3c/imsc/pull/406

Received on Thursday, 28 June 2018 14:28:57 UTC