[iOS] Async animations support #1105

Job	Run time
Build Example App	9m 8s
Build XCFramework	15m 36s
Build Package (14.2)	5m 13s
Build Package (14.3)	4m 12s
Build Package (13.2.1)	4m 7s
Build Package (13.4.1)	5m 23s
Test Carthage support	9m 57s
Lint CocoaPods podspec	5m 22s
Lint Embedded Libraries	1m 6s
Test Swift Package Manager support	4m 18s
Lint Swift	1m 25s
Test Package	18m 32s
	1h 24m 19s

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