Bug in timestamp calculation! #472

I have been receiving this error:
balance 400 Bad Request {"code":-1100,"msg":"Illegal characters found in parameter 'timestamp'; legal range is '^[0-9]{1,20}$'."}

Looking through node-binance-api I see there is an unhanded situation with timestamp storage:

publicRequest( base + 'v3/time', {}, function ( error, response ) { Binance.info.timeOffset = response.serverTime - new Date().getTime(); //Binance.options.log("server time set: ", response.serverTime, Binance.info.timeOffset); callback( error, response ); } );

Both places where timeOffset are set do not consider the possibility that there could be an error in the response and response.serverTime could be invalid. This then causes a cascade of errors with every call that uses timeOffset until it's fetched again.