Using existing TaskQueue, refactoring it to support non-throwing clos… #212

Job	Run time
Build Amplify Swift for iOS / Build Amplify-Package \| iOS	10m 3s
Build Amplify Swift for macOS / Build Amplify-Package \| macOS	6m 54s
Build Amplify Swift for tvOS / Build Amplify-Package \| tvOS	7m 52s
Build Amplify Swift for watchOS / Build Amplify-Package \| watchOS	12m 16s
Confirm Passing Build Steps	1s
	37m 6s

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