v21.2.12
build: enable strict deps enforcement for ts_project (#31780)
refactor(multiple): switch button selectors
fix(material/form-field): use ResizeObserver for label offset calculation (#30702)
build: remove explicit standalone flag from dev apps
docs(multiple): adds screen reader friendly tooltip to hamburger icon (#31746)
docs(multiple): add testonly mode (#31744)
docs: add aria select page (#32508)
docs: use system theme by default (#32409)
docs: replace angular.io links with angular.dev (#29734)