Bump angular from 1.6.1 to 1.7.9 in /ui

Bumps [angular](https://github.com/angular/angular.js) from 1.6.1 to 1.7.9.
- [Release notes](https://github.com/angular/angular.js/releases)
- [Changelog](https://github.com/angular/angular.js/blob/master/CHANGELOG.md)
- [Commits](angular/angular.js@v1.6.1...v1.7.9)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

ui/package-lock.json

@@ -34,7 +34,7 @@
     "@sentry/browser": "^5.15.5",
     "@sentry/integrations": "^5.15.5",
     "ampersand-state": "^4.5.6",
-    "angular": "=1.6.1",
+    "angular": "=1.7.9",
     "angular-animate": "=1.6.1",
     "angular-aria": "=1.6.1",
     "angular-autodisable": "git://github.com/kirstein/angular-autodisable.git",