message: build(UnpkgIOExample): Update webpack dependencies
diff: "karma-webpack": "^2.0.13",
  "tap-spec": "^4.1.1",
  "tape": "^4.9.0",
  - "webpack": "^4.1.1",
  - "webpack-cli": "^2.0.11",
  - "webpack-dev-server": "^3.1.1"
  + "webpack": "^4.20.2",
  + "webpack-cli": "^3.1.2",
  + "webpack-dev-server": "^3.1.9"
  }
  }
  