message: chore(package): update lint-staged to version 7.0.4
  Closes
diff: "image-webpack-loader": "4.2.0",
  "jest": "22.1.4",
  "klaw-sync": "3.0.2",
  - "lint-staged": "7.0.0",
  + "lint-staged": "7.0.4",
  "mini-css-extract-plugin": "0.4.0",
  "minimist": "1.2.0",
  "node-sass": "4.8.3",
  