Update VirtoCommerce.XCart version to 3.1020.0

Author: Lenajava1

backend/packages.json

@@ -316,7 +316,7 @@
         },
         {
           "Id": "VirtoCommerce.XCart",
-          "Version": "3.1019.0"
+          "Version": "3.1020.0"
         },
         {
           "Id": "VirtoCommerce.XCatalog",