message: fix notification transparent window issue
diff: "bluebird": "3.5.1",
  "browserify": "14.5.0",
  "cross-env": "3.2.4",
  - "electron": "2.0.1",
  + "electron": "2.0.2",
  "electron-builder": "20.10.0",
  "electron-builder-squirrel-windows": "12.3.0",
  "electron-chromedriver": "1.8.0",
  