Bumps [angular](https://github.com/angular/angular.js) from 1.7.8 to 1.7.9. **This update includes a security fix.**
- [Release notes](https://github.com/angular/angular.js/releases)
- [Changelog](https://github.com/angular/angular.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/angular/angular.js/compare/v1.7.8...v1.7.9)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>