Update dependency ember-qunit to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ember-qunit	8.1.1 → 9.1.0

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Release Notes

emberjs/ember-qunit (ember-qunit)

v9.1.0

Release (2026-05-16)

• ember-qunit 9.1.0 (minor)

🚀 Enhancement

• ember-qunit
  • #​1204 Use native class syntax for QUnitAdapter (@​bobisjan)
  • #​1203 Remove test-support-suffx.js (@​bobisjan)

🏠 Internal

• Other
  • #​1205 Update release-plan (@​NullVoxPopuli)
  • #​1202 Bump ember-cli to ~6.12.0 in test apps (@​NullVoxPopuli-ai-agent)
• ember-qunit
  • #​1200 Ember 7 compat (@​NullVoxPopuli)

Committers: 3

• @​NullVoxPopuli's reduced-access machine account for AI usage (@​NullVoxPopuli-ai-agent)
• Jan Bobisud (@​bobisjan)
• @​NullVoxPopuli

v9.0.1: Release 9.0.1

Compare Source

🐛 Bug Fix

• #​1183 Export TestLoader (@​ef4)

Committers: 1

• Edward Faulkner (@​ef4)

v9.0.0: Release 9.0.0

Compare Source

💥 Breaking Change

• #​1182 Require explicit calls to loadTests and setupEmberOnerrorValidation (@​ef4)

🏠 Internal

• #​1181 Remove unused babel plugins (@​ef4)

Committers: 1

• Edward Faulkner (@​ef4)

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