[img-conversion] Blink new features (#20)

Hello,

Blinking is bring this new feature: https://wiki.whatwg.org/wiki/OffscreenCanvas
It means Canvas can be accessed by an off-screen worker thread.

I think it will at least partly resolve the problem proposed by this extension here, right? 


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Reply to this email directly or view it on GitHub:
https://github.com/WICG/img-conversion/issues/20