chore(deps): update testing dependencies (major)

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ember-qunit	^8.0.0 -> ^9.0.0
ember-try	^3.0.0 -> ^4.0.0

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Release Notes

emberjs/ember-qunit (ember-qunit)

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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