chore(deps): update dependency @testing-library/dom to v8.20.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@testing-library/dom	8.19.1 -> 8.20.0

---

Release Notes

testing-library/dom-testing-library

### [`v8.20.0`](https://togithub.com/testing-library/dom-testing-library/releases/tag/v8.20.0) [Compare Source](https://togithub.com/testing-library/dom-testing-library/compare/v8.19.1...v8.20.0) ##### Features - add offline/online events ([#​1205](https://togithub.com/testing-library/dom-testing-library/issues/1205)) ([0ce0c70](https://togithub.com/testing-library/dom-testing-library/commit/0ce0c7054dfa64d1cd65053790246aed151bda9d))

---

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.