message: Move chokidar to devDeps
diff: "blueimp-canvas-to-blob": "^3.5.0",
  "browser-encrypt-attachment": "^0.3.0",
  "browser-request": "^0.3.3",
  - "chokidar": "^1.6.1",
  "classnames": "^2.1.2",
  "commonmark": "^0.27.0",
  "draft-js": "^0.8.1",
  "babel-preset-es2016": "^6.11.3",
  "babel-preset-es2017": "^6.14.0",
  "babel-preset-react": "^6.11.1",
  + "chokidar": "^1.6.1",
  "eslint": "^3.13.1",
  "eslint-config-google": "^0.7.1",
  "eslint-plugin-babel": "^4.0.1",
  