Generated package.json missing dev dependencies

[alexmreis]

The generated package.json doesn't include any of the dev dependencies.

Here's what I had to add to my project:

  "devDependencies": {
    "@storybook/addon-actions": "^3.3.3",
    "@storybook/addon-links": "^3.3.3",
    "@storybook/react": "^3.3.3",
    "babel": "^6.23.0",
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.2",
    "babel-plugin-transform-react-jsx": "^6.24.1",
    "babel-preset-env": "^1.6.1",
    "babili-webpack-plugin": "^0.1.2",
    "bore": "^2.0.1",
    "chai": "^4.1.2",
    "find-root": "^1.1.0",
    "karma": "^2.0.0",
    "karma-chrome-launcher": "^2.2.0",
    "karma-mocha": "^1.3.0",
    "karma-webpack": "^2.0.9",
    "mocha": "^4.1.0",
    "node-sass": "^4.7.2",
    "path-is-inside": "^1.0.2",
    "raw-loader": "^0.5.1",
    "react": "^16.2.0",
    "sass-loader": "^6.0.6",
    "storybook": "^1.0.0",
    "webpack": "^3.10.0",
    "webpack-merge": "^4.1.1"
  }