chore(deps): update dependency sinon to v15.0.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sinon (source)	15.0.2 -> 15.0.3

---

Release Notes

sinonjs/sinon

### [`v15.0.3`](https://togithub.com/sinonjs/sinon/blob/HEAD/CHANGES.md#​1503) [Compare Source](https://togithub.com/sinonjs/sinon/compare/v15.0.2...v15.0.3) - [`b775f1b4`](https://togithub.com/sinonjs/sinon/commit/b775f1b4174c5a92fa7fa8f70fbf3f4b5466a39e) Avoid tampering with globals and other modules' exports in tests ([#​2504](https://togithub.com/sinonjs/sinon/issues/2504)) (Carl-Erik Kopseng) - [`477064b6`](https://togithub.com/sinonjs/sinon/commit/477064b628c65220ce9d0ac16cd33ab9b1da93da) fix: make it possible to call through to underlying stub in stub instance ([#​2503](https://togithub.com/sinonjs/sinon/issues/2503)) (Carl-Erik Kopseng) > closes [#​2501](https://togithub.com/sinonjs/sinon/issues/2501) - [`6e19746e`](https://togithub.com/sinonjs/sinon/commit/6e19746e255dfa0fcf78af076e49d5db0eb11c07) Remove dead Travis and Gitter references (Carl-Erik Kopseng) *Released by [Carl-Erik Kopseng](https://togithub.com/fatso83) on 2023-03-26.*

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.