message: remove unnecessary navigation commands from prepare script
diff: "build:bundle": "cross-env NODE_ENV=production rollup --config",
  "build:es2015": "cross-env NODE_ENV=production babel ./src --out-dir ./build/src",
  "build": "npm run build:bundle && npm run build:es2015 && npm run build:copy",
  - "prepare": "cd .. && npm run test && npm run lint && npm run build && cd -",
  + "prepare": "npm run test && npm run lint && npm run build",
  "lint": "eslint ./src/**/*.js*"
  },
  "devDependencies": {
  