解决方案：
npm add @types/baidu-app
- 修改
tsconfig.json文件，在types中加入"weixin-app"
"types": [
"webpack-env",
"@dcloudio/types",
"miniprogram-api-typings",
"mini-types",
"weixin-app"
],
- 修改
sfc.d.ts文件
declare module "*.vue" {
import Vue from 'vue'
import wx from '@types/weixin-app'
export default Vue
}
