Fixed typo.

ios/Classes/QRView.swift

@@ -19,7 +19,7 @@ public class QRView:NSObject,FlutterPlatformView {
     // UPCa uses ean13 object.
     var QRCodeTypes = [
           0: AVMetadataObject.ObjectType.aztec,
-          2: AVMetadataObject.ObjectType.qr,
+          1: AVMetadataObject.ObjectType.qr,
           2: AVMetadataObject.ObjectType.code39,
           3: AVMetadataObject.ObjectType.code93,
           4: AVMetadataObject.ObjectType.code128,
@@ -27,6 +27,7 @@ public class QRView:NSObject,FlutterPlatformView {
           6: AVMetadataObject.ObjectType.ean8,
           7: AVMetadataObject.ObjectType.ean13,
           8: AVMetadataObject.ObjectType.interleaved2of5,
+          9: AVMetadataObject.ObjectType.qr,
           10: AVMetadataObject.ObjectType.pdf417,
           11: AVMetadataObject.ObjectType.qr,
           12: AVMetadataObject.ObjectType.qr,