Modify a single product

curl --request PUT \
  --url https://api.shipbob.com/1.0/product/{productId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'shipbob_channel_id: <shipbob_channel_id>' \
  --data '{
  "barcode": "123456789012",
  "gtin": "012345678905",
  "name": "Medium Blue T-Shirt",
  "sku": "TShirtBlueM",
  "unit_price": 20.32,
  "upc": "012345678912"
}'

{
  "barcode": "123456789012",
  "bundle_root_information": {
    "id": 0,
    "name": "string"
  },
  "channel": {
    "id": 0,
    "name": "House of Slippers"
  },
  "created_date": "2019-08-24T14:15:22Z",
  "fulfillable_inventory_items": [
    {
      "id": 0,
      "name": "Medium Blue T-Shirt",
      "quantity": 0
    }
  ],
  "fulfillable_quantity_by_fulfillment_center": [
    {
      "committed_quantity": 0,
      "fulfillable_quantity": 0,
      "id": 0,
      "name": "Cicero",
      "onhand_quantity": 0
    }
  ],
  "gtin": "012345678905",
  "id": 0,
  "name": "Medium Blue T-Shirt",
  "reference_id": "TShirtBlueM",
  "sku": "TShirtBlueM",
  "total_committed_quantity": 0,
  "total_fulfillable_quantity": 0,
  "total_onhand_quantity": 0,
  "unit_price": 20.32,
  "upc": "012345678912"
}