Bump electron from 1.6.11 to 7.2.4

Bumps [electron](https://github.com/electron/electron) from 1.6.11 to 7.2.4.
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/master/docs/breaking-changes.md)
- [Commits](electron/electron@v1.6.11...v7.2.4)

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

Author: dependabot[bot]

package.json

@@ -5,7 +5,7 @@
   "private": true,
   "devDependencies": {
     "dotenv": "^4.0.0",
-    "electron": "^1.6.11",
+    "electron": "^7.2.4",
     "electron-reload": "^1.2.1",
     "react-scripts": "1.0.7"
   },