hitbtc v2 fetchTicker fix
hitbtc v2 fetchTicker fix

aiueogawa/ccxt,aiueogawa/ccxt,ccxt/ccxt,tritoanst/ccxt,ccxt/ccxt,ccxt/ccxt,tritoanst/ccxt,ccxt/ccxt,aiueogawa/ccxt,tritoanst/ccxt,tritoanst/ccxt,aiueogawa/ccxt,ccxt/ccxt