PSA macfix branch

For any users who had a problem related to either Cairo or Rsvg, we believe we have fixed the problem internally. If you got around the issue with the macfix branch, that should no longer be necessary, and you should switch to the main Mimi branch to make sure you keep up with changes. Simply enter the Pkg mode in the REPL with ], and then type free Mimi to get the latest tagged version (or add Mimi#master if you want to track the very latest master branch), and then pkg> up for good measure to get all of your packages updated.

@kar5469 @FrankErrickson @kran574