Bump angular from 1.7.9 to 1.8.0

Bumps [angular](https://github.com/angular/angular.js) from 1.7.9 to 1.8.0.
- [Release notes](https://github.com/angular/angular.js/releases)
- [Changelog](https://github.com/angular/angular.js/blob/master/CHANGELOG.md)
- [Commits](angular/angular.js@v1.7.9...v1.8.0)

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Author: dependabot[bot]