Update README.md

README.md

@@ -166,6 +166,7 @@ controller.resumeCamera();
 
 # SDK
 Requires at least SDK 21 (Android 5.0).
+Requires at least iOS 8.
 
 # TODOs
 * iOS Native embedding is written to match what is supported in the framework as of the date of publication of this package. It needs to be improved as the framework support improves.