message: refactor(npmtasks): simplify dev task
diff: "scripts": {
  "build": "rollup -c --environment NODE_ENV:production",
  "start": "rollup -w -c",
  - "dev": "cd example && npm start",
  + "dev": "npm start & cd example && npm start",
  "build:example": "npm install && cd example && npm install && npm run build",
  "dev:wait": "start-server-and-test dev http-get://localhost:3000",
  "cy:run": "cypress run",
  