Move MacOS builds to the beginning of the list
Move MacOS builds to the beginning of the list

MacOS takes ages to provision on Travis. Moving it up the list will
hopefully mean that our builds don't wait for MacOS as often they do
nowadays.

der-lyse/newsboat,der-lyse/newsboat,der-lyse/newsboat,newsboat/newsboat,newsboat/newsboat,newsboat/newsboat,newsboat/newsboat,newsboat/newsboat,der-lyse/newsboat,der-lyse/newsboat,newsboat/newsboat,newsboat/newsboat,newsboat/newsboat,der-lyse/newsboat,der-lyse/newsboat,der-lyse/newsboat