{
  "3.0": "2016-02-16",
  "3.1": "2016-06-23",
  "4.0": "2017-01-30",
  "4.1": "2018-03-01",
  "5.0": "2019-02-12",
  "5.1": "2019-12-12",
  "5.2": "2020-07-30",
  "5.3": "2021-06-01"
}