Update dependency qunit to v2.26.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
qunit (source)	2.25.0 → 2.26.0

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Release Notes

qunitjs/qunit (qunit)

v2.26.0

Compare Source

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Added

• Assert: Return error value from assert.rejects() and assert.throws(). (Bartosz Dziewoński) #​1824
• CLI: Add support for --reporter with local script. (Jordan Kasper, Timo Tijhof) #​1823
• Core: Introduce QUnit.config.ignoreUnhandledRejections. (Timo Tijhof) #​1829

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