ECWID-169265 X+E: Stream additional product identifiers. Add additional product codes to the Google Shopping feed

Author: mamirovlspeed

src/main/kotlin/com/ecwid/apiclient/v3/dto/producttype/enums/AttributeType.kt

@@ -11,5 +11,10 @@ enum class AttributeType {
 	EBAY,
 	EBAY_REQUIRED,
 	PRICE_PER_UNIT,
-	UNITS_IN_PRODUCT
+	UNITS_IN_PRODUCT,
+	EXTERNAL_EAN,
+	EXTERNAL_ISBN,
+	EXTERNAL_ITF,
+	EXTERNAL_JAN,
+	EXTERNAL_CUSTOM
 }