feat: Cea708 caption decoder#346

Merged

gkatsev merged 8 commits intovideojs:mainfrom

iamstickfigure:cea708-decoder

Dec 1, 2020

Commits on Jul 8, 2020

Commits on Jul 21, 2020

Fix reset command
levi-snapstream
committed

Commits on Jul 27, 2020

Set startPts on initService
levi-snapstream
committed

Commits on Jul 30, 2020

Add 708 decoder tests
levi-snapstream
committed

Commits on Aug 4, 2020

Refactored text and extended commands
levi-snapstream
committed

Commits on Aug 11, 2020

Added roll-up support and a test
levi-snapstream
committed