[Security] Bump electron from 6.1.7 to 7.2.4

Bumps [electron](https://github.com/electron/electron) from 6.1.7 to 7.2.4. **This update includes security fixes.**
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/master/docs/breaking-changes.md)
- [Commits](electron/electron@v6.1.7...v7.2.4)

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

Author: dependabot-preview[bot]