message: Add clean script to root package
diff: "start": "yarn workspace example-app start",
  "bundle": "yarn build && yarn workspace example-app bundle",
  "build": "lerna run build",
  - "clean": "yarn run clean:cli && yarn run clean:app && yarn run clean:core && yarn run clean:storybook && yarn clean:root",
  - "clean:root": "rimraf node_modules/",
  - "clean:cli":"rimraf packages/cli/dist/ packages/cli/node_modules/",
  - "clean:app":"rimraf packages/app/node_modules/",
  - "clean:core": "rimraf packages/core/dist packages/core/node_modules",
  - "clean:storybook":"rimraf packages/storybook/node_modules",
  + "clean": "lerna run clean",
  "test": "yarn build && lerna run test --since origin/master -- --coverage",
  "test:all": "yarn build && lerna run test -- --coverage",
  "lint": "lerna run lint --since origin/master --",
  