Bump electron from 4.2.12 to 9.1.0

Bumps [electron](https://github.com/electron/electron) from 4.2.12 to 9.1.0.
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/master/docs/breaking-changes.md)
- [Commits](electron/electron@v4.2.12...v9.1.0)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -300,7 +300,7 @@
     "css-loader": "~2.1.1",
     "css-split-webpack-plugin": "~0.2.6",
     "dotenv": "~7.0.0",
-    "electron": "~4.2.12",
+    "electron": "~9.1.0",
     "electron-builder": "~22.4.0",
     "electron-rebuild": "~1.10.0",
     "eslint": "~5.16.0",