chore(deps): update dependency @types/sinon to v9 (#151)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@types/sinon](https://togithub.com/DefinitelyTyped/DefinitelyTyped) | devDependencies | major | [`^7.0.13` -> `^9.0.0`](https://renovatebot.com/diffs/npm/@types%2fsinon/7.5.2/9.0.0) |

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core/packages/teeny-request/package.json

@@ -45,7 +45,7 @@
     "@compodoc/compodoc": "^1.1.9",
     "@types/mocha": "^7.0.0",
     "@types/node-fetch": "^2.1.2",
-    "@types/sinon": "^7.0.13",
+    "@types/sinon": "^9.0.0",
     "@types/uuid": "^7.0.0",
     "c8": "^7.0.0",
     "codecov": "^3.1.0",