okhandbutflipped blurry not identical to default emoji

[fisher60]

Issue

The okhandbutflipped emoji is not identical to the default ok_hand emoji.

Summary

When viewed side-by-side it is clear that the flipped emoji is a little blurry, as well as being thicker and generally different enough that a few users complained about it.

[gustavwilliam]

Unless there's any design decision from the original designer to consider, I could fix this.

[jb3]

Twemoji updated the hand and we didn't which is why the design is different. Go for it @gustavwilliam.

[gustavwilliam]

Perfect; that's what I had expected.