Tweak travis, switch to Xcode 10, remove minor platform tests since Travis constantly changes
Tweak travis, switch to Xcode 10, remove minor platform tests since Travis constantly changes

pollarm/XCGLogger,DaveWoodCom/XCGLogger,adonoho/XCGLogger,pollarm/XCGLogger,DaveWoodCom/XCGLogger,adonoho/XCGLogger