Angular CLI: v21.2.1 Release

@schematics/angular

| Commit | Description | | -- | -- | | | prevent adding test dependencies when minimal option is enabled |

@angular/cli

| Commit | Description | | -- | -- | | | correct dev dependency detection logic in ng add | | | disable npm update notifier in package manager host | | | ensure group members are updated to targeted version | | | ignore unknown files when formatting schematic changes |

@angular-devkit/build-angular

| Commit | Description | | -- | -- | | | update copy-webpack-plugin to v14.0.0 |

@angular/build

| Commit | Description | | -- | -- | | | bundle polyfills to preserve execution order in dev server | | | conditionally allow vi.mock for non-relative imports | | | resolve style include paths relative to ng-package.json in unit-test builder | | | treat empty browsers array as undefined in unit-test builder | | | fix memory leak in ng serve with i18n |

@angular/ssr

| Commit | Description | | -- | -- | | | improve header validation logic | | | introduce DI token to signal route discovery process |