Using fitty synchronously about fitty

[rikschennink]

@miguelcobain appreciate the thorough ticket, and PR. 🙏

I like introducing a sync option better as it doesn't pull in additional specific functionality and is thus more flexibly towards future situations that might also require sync redraw.

Perhaps we can add an options object to requestRedraw(options = { sync: false }), then it cancels the animation frame and calls redraw immediately after.

redrawAll(type) = () => could then change to redrawAll(type) = (options = { sync: false }) => then you could call fitAll({ sync: true })