v21.2.9
refactor(multiple): remove declare global usages (#32991)
build: align icons in docs (#33127)
build: reuse tslint rules for docs site and fix failures
build: enable style lint for docs site
docs: improve properties and methods template (#32071)
build: remove provideHttpClient (#32109)
docs: disallow docs-content for search indexer (#32577)
docs: rename material.angular.io to material.angular.dev (#30993)
docs: improve docs on theming custom components (#32343)
build: switch docs site to application builder
build: rename docs site folder to `docs`