update the zxing JS interop definition

+import 'dart:js_interop';
+
+import 'package:js/js.dart';
+import 'package:web/web.dart';
+
+/// The JS interop class for the ZXing BrowserMultiFormatReader.
+///
+/// See https://github.com/zxing-js/library/blob/master/src/browser/BrowserMultiFormatReader.ts
+@JS('ZXing.BrowserMultiFormatReader')
+@staticInterop
+class ZXingBrowserMultiFormatReader {
+  /// Construct a new ZXingBrowserMultiFormatReader.
+  ///
+  /// The [hints] are the configuration options for the reader.
+  /// The [timeBetweenScansMillis] is the allowed time between scans in milliseconds.
+  ///
+  /// See also: https://github.com/zxing-js/library/blob/master/src/core/DecodeHintType.ts
+  external factory ZXingBrowserMultiFormatReader(
+    JSAny? hints,
+    int? timeBetweenScansMillis,
+  );
+}
+
+extension ZXingBrowserMultiFormatReaderExt on ZXingBrowserMultiFormatReader {
+  /// Set the source for the [HTMLVideoElement] that acts as input for the barcode reader.
+  ///
+  /// This function takes a [HTMLVideoElement], and a [MediaStream] as arguments,
+  /// and returns no result.
+  ///
+  /// See https://github.com/zxing-js/library/blob/master/src/browser/BrowserCodeReader.ts#L1182
+  external JSFunction addVideoSource;
+
+  /// Continuously decode barcodes from a [HTMLVideoElement].
+  ///
+  /// When a barcode is found, a callback function is called with the result.
+  /// The callback function receives a [Result] and an exception object as arguments.
+  ///
+  /// See also: https://github.com/zxing-js/library/blob/master/src/browser/DecodeContinuouslyCallback.ts
+  external JSFunction decodeContinuously;
+
+  /// Whether the video stream is currently playing.
+  ///
+  /// This function takes a [HTMLVideoElement] as argument,
+  /// and returns a [bool].
+  ///
+  /// See https://github.com/zxing-js/library/blob/master/src/browser/BrowserCodeReader.ts#L458
+  external JSFunction isVideoPlaying;
+
+  /// Prepare the video element for the barcode reader.
+  ///
+  /// This function takes a [HTMLVideoElement] as argument,
+  /// and returns the same [HTMLVideoElement],
+  /// after it was prepared for the barcode reader.
+  ///
+  /// See https://github.com/zxing-js/library/blob/master/src/browser/BrowserCodeReader.ts#L802
+  external JSFunction prepareVideoElement;
+
+  /// Reset the barcode reader to it's initial state,
+  /// and stop any ongoing barcode decoding.
+  ///
+  /// This function takes no arguments and returns no result.
+  ///
+  /// See https://github.com/zxing-js/library/blob/master/src/browser/BrowserCodeReader.ts#L1104
+  external JSFunction reset;
+
+  /// Stop decoding barcodes.
+  ///
+  /// This function takes no arguments and returns no result.
+  ///
+  /// See https://github.com/zxing-js/library/blob/master/src/browser/BrowserCodeReader.ts#L396
+  external JSFunction stopContinuousDecode;
+}