Add XCode 10.1 to build matrix
Add XCode 10.1 to build matrix

jessdtate/SCIRun,jessdtate/SCIRun,jessdtate/SCIRun,moritzdannhauer/SCIRunGUIPrototype,jessdtate/SCIRun,moritzdannhauer/SCIRunGUIPrototype,jessdtate/SCIRun,moritzdannhauer/SCIRunGUIPrototype,jessdtate/SCIRun,moritzdannhauer/SCIRunGUIPrototype,jessdtate/SCIRun,moritzdannhauer/SCIRunGUIPrototype,moritzdannhauer/SCIRunGUIPrototype,jessdtate/SCIRun,moritzdannhauer/SCIRunGUIPrototype