Update dependency @types/sinon to v21 (#27)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -47,7 +47,7 @@
     "@tsconfig/recommended": "^1.0.10",
     "@types/chai": "^5.2.2",
     "@types/mocha": "^10.0.10",
-    "@types/sinon": "^20.0.0",
+    "@types/sinon": "^21.0.0",
     "@types/sinon-chai": "^4.0.0",
     "c8": "^10.1.3",
     "chai": "^5.2.1",