Bump electron from 8.5.2 to 9.4.0

Bumps [electron](https://github.com/electron/electron) from 8.5.2 to 9.4.0.
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/master/docs/breaking-changes.md)
- [Commits](electron/electron@v8.5.2...v9.4.0)

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

Author: dependabot[bot]

package-lock.json

@@ -32,7 +32,7 @@
     "babel-eslint": "^10.1.0",
     "browser-sync": "^2.26.7",
     "chai": "^4.1.0",
-    "electron": "^8.2.2",
+    "electron": "^9.4.0",
     "electron-builder": "^22.4.1",
     "electron-devtools-installer": "^3.0.0",
     "electron-mocha": "^8.2.1",