chore(deps): update dependency @types/sinon to v10 (#797)

[![WhiteSource Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [@types/sinon](https://togithub.com/DefinitelyTyped/DefinitelyTyped) | [`^9.0.0` -> `^10.0.0`](https://renovatebot.com/diffs/npm/@types%2fsinon/9.0.11/10.0.0) | [![age](https://badges.renovateapi.com/packages/npm/@types%2fsinon/10.0.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/npm/@types%2fsinon/10.0.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/npm/@types%2fsinon/10.0.0/compatibility-slim/9.0.11)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/npm/@types%2fsinon/10.0.0/confidence-slim/9.0.11)](https://docs.renovatebot.com/merge-confidence/) |

---

### Configuration

:date: **Schedule**: "after 9am and before 3pm" (UTC).

:vertical_traffic_light: **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

:recycle: **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

:no_bell: **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box.

---

This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#github/googleapis/nodejs-dialogflow).

packages/google-cloud-dialogflow/package.json

@@ -51,7 +51,7 @@
   "devDependencies": {
     "@types/mocha": "^8.0.0",
     "@types/node": "^13.11.1",
-    "@types/sinon": "^9.0.0",
+    "@types/sinon": "^10.0.0",
     "c8": "^7.1.0",
     "codecov": "^3.6.5",
     "gts": "^2.0.0",