message: enabled PDF417 scanner
diff: @@ -24,6 +24,7 @@ import QRCodeReader from './qrcode/QRCodeReader';
  import MultiFormatOneDReader from './oned/MultiFormatOneDReader';
  import DataMatrixReader from './datamatrix/DataMatrixReader';
  import NotFoundException from './NotFoundException';
  +import PDF417Reader from './pdf417/PDF417Reader';
  import ReaderException from './ReaderException';
  /*namespace com.google.zxing {*/
  @@ -133,9 +134,9 @@ export default class MultiFormatReader implements Reader {
  // if (formats.includes(BarcodeFormat.AZTEC)) {
  // readers.push(new AztecReader())
  // }
  - // if (formats.includes(BarcodeFormat.PDF_417)) {
  - // readers.push(new PDF417Reader())
  - // }
  + if (formats.includes(BarcodeFormat.PDF_417)) {
  + readers.push(new PDF417Reader());
  + }
  // if (formats.includes(BarcodeFormat.MAXICODE)) {
  // readers.push(new MaxiCodeReader())
  // }
  @@ -152,7 +153,7 @@ export default class MultiFormatReader implements Reader {
  readers.push(new QRCodeReader());
  readers.push(new DataMatrixReader());
  // readers.push(new AztecReader())
  - // readers.push(new PDF417Reader())
  + readers.push(new PDF417Reader());
  // readers.push(new MaxiCodeReader())
  if (tryHarder) {
  