Batch updates cases

Example request

{
  "cases": [
    {
      "location": {
        "country": "GB"
      },
      "travelHistory": {
        "travel": [
          {
            "location": {
              "country": "CR",
              "administrativeAreaLevel1": "Any province in Costa Rica",
              "administrativeAreaLevel2": "Any canton in Costa Rica",
              "administrativeAreaLevel3": "Any district in Costa Rica",
              "place": "Boston Children's Hospital",
              "name": "Lyon, Auvergne-Rhône-Alpes, France"
            }
          }
        ]
      },
      "vaccines": [
        {
          "name": "AstraZeneca",
          "batch": "PV12345"
        }
      ]
    }
  ]
}