message: [Improvement] include "types" in "files" field
diff: "typings": "types/index.d.ts",
  "files": [
  "lib",
  - "packages"
  + "packages",
  + "types"
  ],
  "scripts": {
  "bootstrap": "yarn || npm i && cd ./packages/vant-css/ && yarn || npm i && cd ../../",
  