only synthesize weak alert property under ARC
only synthesize weak alert property under ARC

cabosoft/AnalyticsKit,twobitlabs/AnalyticsKit,brightredchilli/AnalyticsKit,brightredchilli/AnalyticsKit,busybusy/AnalyticsKit,twobitlabs/AnalyticsKit,twobitlabs/AnalyticsKit,busybusy/AnalyticsKit,busybusy/AnalyticsKit,busybusy/AnalyticsKit