Bump sinon-chai from 3.5.0 to 3.7.0 (openstf#115)

Bumps [sinon-chai](https://github.com/domenic/sinon-chai) from 3.5.0 to 3.7.0.
- [Release notes](https://github.com/domenic/sinon-chai/releases)
- [Changelog](https://github.com/domenic/sinon-chai/blob/master/CHANGELOG.md)
- [Commits](chaijs/sinon-chai@3.5.0...3.7.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -74,7 +74,7 @@
 "prettier": "^2.2.1",
 "rimraf": "^3.0.2",
 "sinon": "~9.2.1",
-"sinon-chai": "~3.5.0",
+"sinon-chai": "~3.7.0",
 "ts-node": "^9.1.1",
 "typescript": "^4.1.3"
 },