Bump electron from 2.0.18 to 9.1.0

Bumps [electron](https://github.com/electron/electron) from 2.0.18 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@v2.0.18...v9.1.0)

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

Author: dependabot[bot]

package.json

@@ -24,7 +24,7 @@
     "ajv-keywords": "^3.2.0",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "concurrently": "^3.6.1",
-    "electron": "^2.0.5",
+    "electron": "^9.1.0",
     "electron-packager": "^12.1.0",
     "extract-text-webpack-plugin": "^4.0.0-beta.0",
     "jest": "^23.4.2",