[webvtt] Add properties of Fill and Stroke spec plus `paint-order` to properties that apply to `::cue` and `::cue()` (#545)
[webvtt] Pull Request: Fixup format.py, run it on index.bs
[webvtt] Pull Request: Replace api.csswg.org with spec-generator
Call for Consensus for transferring ownership of the WebVTT spec to be wholly owned by the TTWG
- Re: Call for Consensus for transferring ownership of the WebVTT spec to be wholly owned by the TTWG