[minor typing bug] `ICanvasRenderingContext` misses `ellipse`

The

misses

CC @Evgeni_Popov

cc @Cedric.

I think this interface has been added for Native, but I don’t know if ellipse is supported there?

yes, @Evgeni_Popov is correct, it’s been added for Native. Feel free to open a PR to add missing declarations in the interface!