chore(deps): update dependency @types/sinon to v21

Author: renovate-bot

package.json

@@ -73,7 +73,7 @@
     "@types/mocha": "^10.0.10",
     "@types/node": "^22.14.0",
     "@types/proxyquire": "^1.3.31",
-    "@types/sinon": "^17.0.4",
+    "@types/sinon": "^21.0.0",
     "c8": "^10.1.3",
     "codecov": "^3.8.3",
     "discovery-tsd": "^0.3.0",