Bump electron from 8.2.0 to 9.4.0 in /electron

Bumps [electron](https://github.com/electron/electron) from 8.2.0 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@v8.2.0...v9.4.0)

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

electron/package.json

@@ -9,7 +9,7 @@
     "dist:dir": "yarn dist --dir -c.compression=store -c.mac.identity=null"
   },
   "devDependencies": {
-    "electron": "8.2.0",
+    "electron": "9.4.0",
     "electron-builder": "^22.4.1",
     "electron-webpack": "^2.8.2",
     "mini-css-extract-plugin": "^1.3.9",

electron/yarn.lock

@@ -2633,10 +2633,10 @@ electron-webpack@^2.8.2:
     webpack-merge "^4.2.2"
     yargs "^15.3.1"
 
-electron@8.2.0:
-  version "8.2.0"
-  resolved "https://registry.yarnpkg.com/electron/-/electron-8.2.0.tgz#f3e3de23a6178b5ad7baa70f4814d6332a3212c2"
-  integrity sha512-mnV43gKCrCUMHLmGws/DU/l8LhaxrFD53A4ofwtthdCqOZWGIdk1+eMphiVumXR5a3lC64XVvmXQ2k28i7F/zw==
+electron@9.4.0:
+  version "9.4.0"
+  resolved "https://registry.yarnpkg.com/electron/-/electron-9.4.0.tgz#c3c607e3598226ddbaaff8babcdffa8bb2210936"
+  integrity sha512-hOC4q0jkb+UDYZRy8vrZ1IANnq+jznZnbkD62OEo06nU+hIbp2IrwDRBNuSLmQ3cwZMVir0WSIA1qEVK0PkzGA==
   dependencies:
     "@electron/get" "^1.0.1"
     "@types/node" "^12.0.12"