Update mocha-sinon requirement from ^1.1.5 to ^2.1.0
Update mocha-sinon requirement from ^1.1.5 to ^2.1.0

Updates the requirements on [mocha-sinon](https://github.com/elliotf/mocha-sinon) to permit the latest version.
- [Release notes](https://github.com/elliotf/mocha-sinon/releases)
- [Commits](https://github.com/elliotf/mocha-sinon/commits/v2.1.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
zenware/gfinance