fix(auth): Using a custom Foundation-based HTTPClient for HTTP Reques… #100

Job	Run time
Build Amplify Swift for iOS / Build Amplify-Build \| iOS	9m 36s
Build Amplify Swift for macOS / Build Amplify-Build \| macOS	9m 43s
Build Amplify Swift for tvOS / Build Amplify-Build \| tvOS	10m 39s
Build Amplify Swift for watchOS / Build Amplify-Build \| watchOS	7m 41s
Confirm Passing Build Steps	1s
	37m 40s

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