Exception in appendWindowState + appendDoorState

[t0bias-r]

I had an 429 error yesterday (normal for too many requests)
{"errorCode":"gw.error.VINquotalimitReached","description":"Global quota limit by VIN was reached"}}
{"error":{"errorCode":"gw.error.VINquotalimitReached","description":"Global quota limit by VIN was reached"}}

Further selectiveStatus requests returned and empty Json {}.
appendWindowState + appendDoorState cause an exception because the existance of the field is not checked:
https://github.com/arjenvrh/audi_connect_ha/blob/8065ff79c462e7daead19338a12f54b08b45f430/custom_components/audiconnect/audi_models.py#L152-L153
https://github.com/arjenvrh/audi_connect_ha/blob/8065ff79c462e7daead19338a12f54b08b45f430/custom_components/audiconnect/audi_models.py#L118-L119