Fix Swift API usage in watchOS starter project.

Author: nlutsenko

ParseStarterProject/watchOS/ParseStarterProject-Swift/ParseStarterProject/AppDelegate.swift

@@ -49,7 +49,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         let defaultACL = PFACL();
 
         // If you would like all objects to be private by default, remove this line.
-        defaultACL.setPublicReadAccess(true)
+        defaultACL.publicReadAccess = true
 
         PFACL.setDefaultACL(defaultACL, withAccessForCurrentUser:true)