fix paused callback handling for windows
fix paused callback handling for windows

On Windows, pauseScanning/stopScanning were already synchronous.
This problem was introduced with the new synchronous pause/stop
handling for iOS/Android. The callbacks would not be invoked
anymore.

Scandit/barcodescanner-sdk-cordova,Scandit/barcodescanner-sdk-cordova,Scandit/barcodescanner-sdk-cordova,Scandit/barcodescanner-sdk-cordova