Bump sinon from 20.0.0 to 21.0.0

Bumps [sinon](https://github.com/sinonjs/sinon) from 20.0.0 to 21.0.0.
- [Release notes](https://github.com/sinonjs/sinon/releases)
- [Changelog](https://github.com/sinonjs/sinon/blob/main/docs/changelog.md)
- [Commits](https://github.com/sinonjs/sinon/commits)

---
updated-dependencies:
- dependency-name: sinon
  dependency-version: 21.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -53,7 +53,7 @@
     "mocha": "^11.0.1",
     "nock": "^14.0.0",
     "should": "^13.2.3",
-    "sinon": "^20.0.0"
+    "sinon": "^21.0.0"
   },
   "files": [
     "index.mjs",