chore(deps): update dependency qunit to ^2.19.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
qunit (source)	^2.19.3 -> ^2.19.4

---

Release Notes

qunitjs/qunit

### [`v2.19.4`](https://togithub.com/qunitjs/qunit/blob/HEAD/History.md#​2194--2023-01-23) [Compare Source](https://togithub.com/qunitjs/qunit/compare/2.19.3...2.19.4) \================== ##### Fixed - Core: Fix memory leak via `config.timeoutHandler` from last async test. (Sergey Astapov)

---

Configuration

📅 Schedule: Branch creation - "after 9pm on sunday" (UTC), 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.

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: 618fc3b34ba406baea7f6a84446ff552df587c72

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions[bot]]

Preview URLs

GH Env: preview docs: https://e6aa9352.ember-headless-table.pages.dev api docs: https://e6aa9352.ember-headless-table.pages.dev/api/modules.html