⬆️ Bump electron from 4.1.4 to 4.2.0 (#498)

Bumps [electron](https://github.com/electron/electron) from 4.1.4 to 4.2.0.
- [Release notes](https://github.com/electron/electron/releases)
- [Commits](electron/electron@v4.1.4...v4.2.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -104,7 +104,7 @@
   },
   "dependencies": {
     "clean-css": "4.2.1",
-    "electron": "4.1.4",
+    "electron": "4.2.0",
     "electron-builder": "^20.39.0",
     "electron-rebuild": "1.8.4",
     "node-abi": "2.8.0",