Integrate history/versioning data

[alexcasalboni]

SSM returns this data:

{
  "Name": "...",
  "LastModifiedDate": "...",
  "Value": "...",
  "Version": 3,
  "Type": "String",
  "ARN": "..."
}

We could integrate fields such as Version and LastModifiedData in the SSMParameter class. It would allow you to integrate them into refreshing logics or other customizations.