Update README.md

Author: andychowhh

README.md

@@ -35,7 +35,8 @@ You can provide a variety of extra customization options to `CodeScannerView` in
 - `showViewfinder` determines whether to show a box-like viewfinder over the UI. Default: false.
 - `simulatedData` allows you to provide some test data to use in Simulator, when real scanning isn’t available. Default: an empty string.
 - `shouldVibrateOnSuccess` allows you to determine whether device should vibrate when a code is found. Default: true.
-- `videoCaptureDevice` allows you to choose different capture device that is most suitable for code to scan. 
+- `videoCaptureDevice` allows you to choose different capture device that is most suitable for code to scan.
+- `isTorchOn` turns on the phone’s torch/flashlight.
 
 If you want to add UI customization, such as a dedicated Cancel button, you should wrap your `CodeScannerView` instance in a `NavigationView` and use a `toolbar()` modifier to add whatever buttons you want.