Upgrade TypeScript to v3.1
Upgrade TypeScript to v3.1

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