chore(deps): update dependency qunit to v2.21.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
qunit (source)	2.19.1 -> 2.21.0

---

Release Notes

qunitjs/qunit (qunit)

v2.21.0

Compare Source

==================

Added

• Assert: Add assert.closeTo(). (Timo Tijhof) #​1735
• Core: Add support for flat preconfig via environment/global variables. (Timo Tijhof)

Deprecated

• Core: Deprecate QUnit.load() and document migration path at https://qunitjs.com/api/QUnit/load/. (Timo Tijhof) #​1743
• Core: Deprecate unset testTimeout for tests taking longer than 3 seconds. (Timo Tijhof) #​1483

v2.20.1

Compare Source

==================

Fixed

• Core: Fix compatibility with sinon.useFakeTimers in IE 10 and IE 11. (Timmy Willison) #​1738
• Core: Fix hanging assert.async() after assert.timeout(). (Timo Tijhof) #​1705

v2.20.0

Compare Source

==================

Added

• Core: Add QUnit.reporters.perf. (Timo Tijhof) #​1714

Changed

• Assert: Add type check for assert.async() parameter. (Zixin Yin) #​1721
• HTML Reporter: Remove units for 0 values in qunit.css. (Hareesh) #​1715

Fixed

• Core: Faster inArray by using Array.prototype.includes when possible. (Izel Nakri)

v2.19.4

Compare Source

==================

Fixed

• Core: Fix memory leak via config.timeoutHandler from last async test. (Sergey Astapov)

v2.19.3

Compare Source

==================

Fixed

• Assert: Restore how deepEqual treats imposter objects. (Timo Tijhof) #​1706

v2.19.2

Compare Source

==================

Changed

• Core: Faster diffing for config.noglobals by refactoring slow mutations. (Izel Nakri) #​1697
• Assert: Improve performance of QUnit.equiv(). (Izel Nakri) #​1700
• Assert: Faster deepEqual for Map values by avoiding typeEquiv calls. (Timo Tijhof)
• Assert: Faster deepEqual by reducing internal objectType checks. (Timo Tijhof)
• Assert: Faster deepEqual by using re-assignment for internal pairs. (Timo Tijhof)

Fixed

• Core: Fix inaccurate count in reporter output after re-run. #​1687
• CLI: Fix MaxListeners warning in long-running watch mode. #​1692

---

Configuration

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

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

♻ 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.