[UPDATE] Xcode 5.1 update checks

Author: Michael Ehrmann

Diff for: PSMTabBarControl.xcodeproj/project.pbxproj

@@ -555,7 +555,7 @@
 		0259C573FE90428111CA0C5A /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0500;
+				LastUpgradeCheck = 0510;
 			};
 			buildConfigurationList = C056398B08A954F8003078D8 /* Build configuration list for PBXProject "PSMTabBarControl" */;
 			compatibilityVersion = "Xcode 3.2";