message: Update npm scripts.
diff: "styled-components": "^3.4.6"
  },
  "scripts": {
  - "build": "yarn lint && yarn webpack --mode=production",
  + "build": "yarn webpack --mode=production",
  "dev": "webpack-dev-server --config ./webpack.config.js --mode=development",
  - "lint": "eslint \"src/**/*.{jsx,js}\" && eslint graveyard.json && node graveyard.test.js",
  - "test": "jest",
  + "lint": "eslint \"src/**/*.{jsx,js}\" && eslint graveyard.json",
  + "test": "yarn lint && jest && yarn build",
  "jest": "jest"
  },
  "jest": {
  