[Icon Requests from Feather] dices

[karsa-mistmere]

As per #119 and feathericons/feather#812:

[ericfennis]

@karsa-mistmere We already have a dice icons, So I think this should be dices.
For the icon, hard to tell which is better. I think the second one.

Can you try post one mirrored horizontally?

[karsa-mistmere]

Actually, dice is technically already plural, but sure, to avoid confusion, let's call this variant dices:

[ericfennis]

I think I like the 6th version but then with 2 dots instead of 4. I think 2 dots are more recognizable as a dice.