UnsignedDeviceInfo in DeviceKeys should be mapped to 'unsigned'

Hi,

Thx for this framework!. It was very helpful and saved me a lot of time. Just one small thing I've found: Currently the unsignedDeviceInfo property in the DeviceKeys model class will be mapped to 'unsignedDeviceInfo' in JSON. This is wrong according to the Matrix Client-Server API spec. It should be mapped to 'unsigned'.

See https://matrix.org/docs/spec/client_server/latest#post-matrix-client-r0-keys-query

Current:

"device_keys": {
    "@userId:homeserver": {
        "aDeviceId": {
            ...
            "unsignedDeviceInfo": {
                "device_display_name": "whatever"
            },
            "unsigned": {}
        }
    }
}

Correct:

"device_keys": {
    "@userId:homeserver": {
        "aDeviceId": {
            ...
            "unsigned": {
                "device_display_name": "whatever"
            }
        }
    }
}

ma1uta / jeon

UnsignedDeviceInfo in DeviceKeys should be mapped to 'unsigned' #13