Bump electron from 4.2.5 to 7.2.4

Bumps [electron](https://github.com/electron/electron) from 4.2.5 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@v4.2.5...v7.2.4) Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]