v2.1.2

Fixed

• Widget back/close buttons now appear correctly — the SDK signals to the widget whether the host app has registered an onClose handler. If onClose is not provided, the widget's back and close buttons are hidden (since there is no handler to invoke). Make sure to pass onClose if you want users to be able to dismiss the widget from within it.
• React Native SDK bumped to 3.3.2.
• React Web SDK bumped to 1.3.2.