Rework Cat Expressions

[raymonable]

Currently, the cat face emojis with expressions are differently shaped than the cat face emoji.

Cat face:

Cat face with exp:

Here's my proposition:

(I do not have the SVG files at the moment.)

It does not use features from the original Cat faces with expressions, but rather from the regular emojis.
Including the brownish tint that the originals had, compared to the cats'.

[raymonable]

It seems that lots of other platforms already chose to stick with the original cat face, it'd make sense to continue with that.