added error code capturing for zuul child process
added error code capturing for zuul child process

socketio/socket.io-client,nkzawa/socket.io-client,Nibbler999/socket.io-client,socketio/socket.io-client,socketio/socket.io-client,nus-fboa2016-si/socket.io-client,ayhansalami/socket.io-client,Automattic/socket.io-client