Upgrade: bump sinon from 9.0.2 to 9.0.3 (#100)

Bumps [sinon](https://github.com/sinonjs/sinon) from 9.0.2 to 9.0.3.
- [Release notes](https://github.com/sinonjs/sinon/releases)
- [Changelog](https://github.com/sinonjs/sinon/blob/master/CHANGELOG.md)
- [Commits](sinonjs/sinon@v9.0.2...v9.0.3)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>