chore(deps): update dependency sinon to v21

Author: renovate[bot]

package-lock.json

@@ -45,7 +45,7 @@
     "jest": "29.7.0",
     "lint-staged": "14.0.1",
     "prettier": "3.6.2",
-    "sinon": "15.2.0",
+    "sinon": "21.0.0",
     "standard-version": "9.5.0",
     "ts-jest": "29.4.1",
     "ts-node": "10.9.2",