Bump sinon from 8.1.1 to 9.0.0 (#55)

Bumps [sinon](https://github.com/sinonjs/sinon) from 8.1.1 to 9.0.0.
- [Release notes](https://github.com/sinonjs/sinon/releases)
- [Changelog](https://github.com/sinonjs/sinon/blob/master/CHANGELOG.md)
- [Commits](sinonjs/sinon@v8.1.1...v9.0.0)

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

package.json

@@ -58,7 +58,7 @@
     "nock": "^12.0.1",
     "npm-run-all": "^4.1.5",
     "nyc": "^15.0.0",
-    "sinon": "^8.0.4",
+    "sinon": "^9.0.0",
     "validate-commit-msg": "^2.14.0",
     "yaml-lint": "^1.2.4"
   }