Bump electron from 1.8.2 to 1.8.8

Bumps [electron](https://github.com/electron/electron) from 1.8.2 to 1.8.8.
- [Release notes](https://github.com/electron/electron/releases)
- [Commits](electron/electron@v1.8.2...v1.8.8)

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

Author: dependabot[bot]