GameKit macOS 10.15 Beta 2 to Beta 3 API Differences

GKAchievementViewController.h
Modified GKAchievementViewController.achievementDelegate
Declaration
From@property (atomic, assign) id<GKAchievementViewControllerDelegate> achievementDelegate
To@property (atomic, weak) id<GKAchievementViewControllerDelegate> achievementDelegate

GKLeaderboardViewController.h
Modified GKLeaderboardViewController.leaderboardDelegate
Declaration
From@property (atomic, assign) id<GKLeaderboardViewControllerDelegate> leaderboardDelegate
To@property (atomic, weak) id<GKLeaderboardViewControllerDelegate> leaderboardDelegate