text: Title: Support bybit candles -> is closed
  Body: **Is your feature request related to a problem? Please describe.**
  NO
  
  **Describe the solution you'd like**
  I would like to store only confirmed data from bybit.
  
  **Describe alternatives you've considered**
  Add following to bybit.py
  
      def __init__(self, candle_closed_only=False, **kwargs):
          super().__init__(**kwargs)
          self.candle_closed_only = candle_closed_only
          self.ws_defaults['compression'] = None
  
  Edit following in bybit.py
  
      async def _candle(self, msg: dict, timestamp: float):
          '''
          {
              "topic": "klineV2.1.BTCUSD",                //topic name
              "data": [{
                  "start": 1572425640,                    //start time of the candle
                  "end": 1572425700,                      //end time of the candle
                  "open": 9200,                           //open price
                  "close": 9202.5,                        //close price
                  "high": 9202.5,                         //max price
                  "low": 9196,                            //min price
                  "volume": 81790,                        //volume
                  "turnover": 8.889247899999999,          //turnover
                  "confirm": False,                       //snapshot flag
                  "cross_seq": 297503466,
                  "timestamp": 1572425676958323           //cross time
              }],
              "timestamp_e6": 1572425677047994            //server time
          }
          '''
          symbol = self.exchange_symbol_to_std_symbol(msg['topic'].split(".")[-1])
          ts = msg['timestamp_e6'] / 1_000_000
  
          for entry in msg['data']:
  
  >             if self.candle_closed_only and entry['confirm']:
  
                  c = Candle(self.id,
                      symbol,
                      entry['start'],
                      entry['end'],
                      self.candle_interval,
                      None,
                      Decimal(entry['open']),
                      Decimal(entry['close']),
                      Decimal(entry['high']),
                      Decimal(entry['low']),
                      Decimal(entry['volume']),
                      
  
  > entry['confirm'],
  
                      ts,
                      raw=entry)
                  await self.callback(CANDLES, c, timestamp)
  
  Can you please add this. Thank you and best regards.