v21.2.14
refactor(cdk/tree): fix strict property initialization errors
build: enable AoT compilation for all tests (#31930)
docs: replace angular.io links with angular.dev (#29734)
refactor(multiple): remove standalone flag from CDK
fix(cdk/tree): enter/space key on child node should not toggle parent node expansion (#33125)
docs: correct treeNodeDef selectors (#31421)
docs(material/datepicker): fixed typo in `cdkTreeNodeTypeaheadLabel` input description (#33106)