Can Array<T> accept null value for JSON-like formats ?

These are valid in standard JSON https://www.json.org/

```
{"friends":[]} 
{"friends":null}
```

the datatype is Array(String), it will get exceptions when consuming

```
CREATE TABLE IF NOT EXISTS event(
  friends Array(String)
) ENGINE = Kafka('localhost:9092', 'topic', 'group', 'JSONEachRow');
```

it's better if `null` can be deserialized as empty Array

Thank you.


