message: build: prepublishOnly -> prepack
  Should not have sideeffects in prepublish
diff: "dev": "yarn build:dev --watch",
  "lint": "yarn eslint . --ext .js,.jsx,.ts,.tsx",
  "prepare": "husky install",
  - "prepublishOnly": "yarn build:prod",
  + "prepack": "yarn build:prod",
  "start:demo": "yarn build:dev && cd demo && yarn start",
  "test": "yarn jest"
  },
  