chore(deps-dev): bump sinon from 19.0.5 to 21.0.0

Bumps [sinon](https://github.com/sinonjs/sinon) from 19.0.5 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-lock.json

@@ -135,7 +135,7 @@
     "eslint": "^9.0.0",
     "mocha": "^10.8.2",
     "ovsx": "^0.9.0",
-    "sinon": "^19.0.2",
+    "sinon": "^21.0.0",
     "typescript": "^5.6.3"
   }
 }