chore: bump @types/sinon from ^17.0.3 to ^21.0.0

Author: github-actions[bot]

denops/@denops-private/cli_test.ts

@@ -1,5 +1,5 @@
 // NOTE: Use sinon to stub the getter property.
-// @deno-types="npm:@types/sinon@^17.0.3"
+// @deno-types="npm:@types/sinon@^21.0.0"
 import sinon from "sinon";
 
 import {

denops/@denops-private/worker_test.ts

@@ -1,4 +1,4 @@
-// @deno-types="npm:@types/sinon@^17.0.3"
+// @deno-types="npm:@types/sinon@^21.0.0"
 import sinon from "sinon";
 import {
   assertEquals,