#40 Typescript transition step 21: fix browser.ts & tslint
#40 Typescript transition step 21: fix browser.ts & tslint

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