The last line in `data` section of the output is always empty. 

```
# clickhouse-client
ClickHouse client version 20.5.2.7 (official build).
Connecting to localhost:9001 as user default.
Connected to ClickHouse server version 20.5.2 revision 54435.

sas-vrxctd96rqw5lw25.db.yandex.net :) select 1 format JSON

SELECT 1
FORMAT JSON

{
	"meta":
	[
		{
			"name": "1",
			"type": "UInt8"
		}
	],

	"data":
	[
		{
			"1": 1

	],

	"rows": 1,

	"statistics":
	{
		"elapsed": 0.00019223,
		"rows_read": 1,
		"bytes_read": 1
	}
}

```

The issue appears only in interactive mode. In non-interactive mode clickhouse-client produces the correct output:

```
# clickhouse-client -q 'select 1 format JSON'
{
	"meta":
	[
		{
			"name": "1",
			"type": "UInt8"
		}
	],

	"data":
	[
		{
			"1": 1
		}
	],

	"rows": 1,

	"statistics":
	{
		"elapsed": 0.000220845,
		"rows_read": 1,
		"bytes_read": 1
	}
}
``` 

sitch (packet.type)
        {
            se Protocol::Server::Da:
                if 
                    onDa(packet.block)
                return true
            se Protocol::Server::Progress:
                onProgress(packet.progress)
                return true
            se Protocol::Server::ProfileInfo:
                onProfileInfo(packet.profile_info)
                return true
            se Protocol::Server::Tols:
                if 
                    onTols(packet.block)
                return true
            se Protocol::Server::Extremes:
                if 
                    onExtremes(packet.block)
                return true
            se Protocol::Server::Exception:
                onReceiveExceptionFromServer(*packet.exception)
                last_exception_received_from_server = std::move(packet.exception)
                return false
            se Protocol::Server::Log:
                onLogDa(packet.block)
                return true
            se Protocol::Server::EndOfStream:
                onEndOfStream()
                return false