chore(deps-dev): bump @angular/cli from 7.3.9 to 8.1.2

Bumps [@angular/cli](https://github.com/angular/angular-cli) from 7.3.9 to 8.1.2.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Commits](angular/angular-cli@v7.3.9...v8.1.2)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]