Bump electron from 8.2.4 to 9.0.0 (#41)

Bumps [electron](https://github.com/electron/electron) from 8.2.4 to 9.0.0.
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/master/docs/breaking-changes.md)
- [Commits](https://github.com/electron/electron/compare/v8.2.4...v9.0.0)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

package.json

@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "main": "app.js",
   "dependencies": {
-    "electron": "^8.2.4",
+    "electron": "^9.0.0",
     "socket.io": "*"
   },
   "repository": {