[maven-release-plugin] prepare release netty-socketio-1.6.3
[maven-release-plugin] prepare release netty-socketio-1.6.3

dszls/netty-socketio,honger05/netty-socketio,noahxinhao/netty-socketio,mosoft521/netty-socketio,yonglehou/netty-socketio,fengshao0907/netty-socketio,xiaoyangjia/netty-socketio,ryandietrich/netty-socketio,liyang1025/netty-socketio,evanlucas/netty-socketio,hkleecn/netty-socketio,hello2009chen/netty-socketio,robymus/netty-socketio,mrniko/netty-socketio,bright60/netty-socketio,mlc0202/netty-socketio,narry/netty-socketio