feat: Add UPC-A support (#2563)

* Add UPC_A support

* Add documentation for UPC-A on iOS

* Doc adjustments

---------

Co-authored-by: Keaton Roux <keaton@codehesion.co.za>

package/ios/Parsers/AVMetadataObject.ObjectType+descriptor.swift

@@ -40,6 +40,9 @@ extension AVMetadataObject.ObjectType {
     case "upc-e":
       self = .upce
       return
+    case "upc-a":
+      self = .ean13
+      return
     case "qr":
       self = .qr
       return