v22.0.0-next.6
feat(aria/tree): add test harnesses (#33066)
refactor(aria/tree): split directives and resolve circular dependencies
build: set up public-api files for aria (#32535)
fix(multiple): type issues when importing Aria directives (#32561)
refactor(aria/accordion): Replace ContentChildren with manual registration of triggers (#33027)
refactor(multiple): migrate Accordion and Tree to ClickEventManager (#33036)