message: upgrade electron version
diff: "license": "Apache",
  "devDependencies": {
  "copy-webpack-plugin": "5.0.3",
  - "electron": "5.0.3",
  - "electron-builder": "21.0.10",
  + "electron": "^6.0.9",
  + "electron-builder": "21.1.6",
  "electron-devtools-installer": "2.2.4",
  "eslint": "5.16.0",
  "eslint-plugin-import": "2.18.1",
  