chore(deps-dev): bump sinon from 20.0.0 to 21.0.0 (#617)

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

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Author: dependabot[bot]

package-lock.json

@@ -94,7 +94,7 @@
     "prettier": "3.5.3",
     "prettier-plugin-packagejson": "^2.5.12",
     "rimraf": "^6.0.1",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "sinon-test": "^3.1.6",
     "strip-ansi": "^7.1.0",
     "typescript": "5.8.3",