message: RM612 Modify input example to have date range for one of shipments
diff: "id": "1a",
  "type": "shipment",
  "carrier": "ups",
  - "tracking": "1Z038EY90300111662"
  + "tracking": "1Z038EY90300111662",
  + "from_date": "2020-03-02T08:13:28.311Z",
  + "thru_date": "2020-03-02T09:32:23.172Z"
  },
  {
  "id": "2",
  