Bumps [@angular-devkit/build-angular](https://github.com/angular/angular-cli) from 0.803.19 to 0.803.20.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Commits](https://github.com/angular/angular-cli/commits)
Signed-off-by: Ndependabot-preview[bot] <support@dependabot.com>