Handle mailbox destroy response

[EliRibble]

I sent a request via jmapc to my stalwart-mail installation. The request succeeded and I got the following back:

{
        "methodResponses": [[
            "Mailbox/set", {
                "accountId":"b",
                "oldState":"sr7qyb20337cy7aq",
                "newState":"sr1qybomaqodi7aq",
                "destroyed":["co"]
            },
        "single.Mailbox/set"]],
        "sessionState":"d    a6ec18c"
    }

jmapc failed to parse the destroyed object.