message: docs: release notes for the v9.1.0-rc.2 release
diff: +<a name="9.1.0-rc.2"></a>
  +# [9.1.0-rc.2](https://github.com/angular/angular/compare/9.1.0-rc.1...9.1.0-rc.2) (2020-03-24)
  +
  +
  +### Bug Fixes
  +
  +* **common:** let `KeyValuePipe` accept type unions with `null` ([#36093](https://github.com/angular/angular/issues/36093)) ([407fa42](https://github.com/angular/angular/commit/407fa42)), closes [#35743](https://github.com/angular/angular/issues/35743)
  +* **elements:** correctly handle setting inputs to `undefined` ([#36140](https://github.com/angular/angular/issues/36140)) ([e066bdd](https://github.com/angular/angular/commit/e066bdd))
  +* **elements:** correctly set `SimpleChange#firstChange` for pre-existing inputs ([#36140](https://github.com/angular/angular/issues/36140)) ([447a600](https://github.com/angular/angular/commit/447a600)), closes [#36130](https://github.com/angular/angular/issues/36130)
  +* **ngcc:** use path-mappings from tsconfig in dependency resolution ([#36180](https://github.com/angular/angular/issues/36180)) ([6defe96](https://github.com/angular/angular/commit/6defe96)), closes [#36119](https://github.com/angular/angular/issues/36119)
  +* **ngcc:** use preserve whitespaces from tsconfig if provided ([#36189](https://github.com/angular/angular/issues/36189)) ([aef4323](https://github.com/angular/angular/commit/aef4323)), closes [#35871](https://github.com/angular/angular/issues/35871)
  +
  +
  +### Features
  +
  +* **compiler:** add dependency info and ng-content selectors to metadata ([#35695](https://github.com/angular/angular/issues/35695)) ([fb70083](https://github.com/angular/angular/commit/fb70083))
  +
  +
  +
  <a name="9.1.0-rc.1"></a>
  # [9.1.0-rc.1](https://github.com/angular/angular/compare/9.1.0-rc.0...9.1.0-rc.1) (2020-03-23)
  