Digifinex parseTicker fix ```{ "code":0, "date":1410431266, "ticker":{ "usdt_btc": { "buy":6713.12, "high":6751.00, "last":6713.95, "low":6617.60, "sell":6714.12, "vol":15091.39199642, "base_vol":143398406.74998, "change":0.0108 }, "btc_eth":{ "buy":0.119241, "high":0.121186, "last":0.119341, "low":0.117405, "sell":0.119341, "vol":39159.39199642, "base_vol":857.12077202, "change":-0.0812 }, ... } }``` [ci skip]