ucommon 6.2.2 (new formula)

It’s a useful secure library that does stuff; It has a pretty complicated history, I’d drown the entire commit message if I tried to explain what it does and why.
Will do :+1:. Ideally they'll add a configure switch along the lines of ``` --build-osx ``` or something to deal with this, but given the FSF's attitude towards non-free things I don't necessary know how they'll feel about bending to complexity :grinning: