fix room leaver type from Contact to Contact[] (#1334)
fix room leaver type from Contact to Contact[] (#1334)

lijiarui/wechaty,wechaty/wechaty,zixia/wechaty,binsee/wechaty,binsee/wechaty,Chatie/wechaty,mukaiu/wechaty,binsee/wechaty,mukaiu/wechaty,zixia/wechaty,Chatie/wechaty,wechaty/wechaty,mukaiu/wechaty,Chatie/wechaty,lijiarui/wechaty,wechaty/wechaty