build(deps): bump angular from 1.6.8 to 1.7.9

Bumps [angular](https://github.com/angular/angular.js) from 1.6.8 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@v1.6.8...v1.7.9)

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

Author: dependabot[bot]

package.json

@@ -1,6 +1,6 @@
 {
   "dependencies": {
-    "angular": "^1.6.8",
+    "angular": "^1.7.9",
     "angular-animate": "^1.6.8",
     "angular-aria": "^1.6.8",
     "angular-material": "^1.1.9",

yarn.lock

@@ -96,9 +96,9 @@ angular-ui-router@^0.4.3:
   dependencies:
     angular "^1.0.8"
 
-angular@^1.0.8, angular@^1.6.8:
-  version "1.6.8"
-  resolved "http://registry.npm.taobao.org/angular/download/angular-1.6.8.tgz#5be378a58be91a5489e78b59c4518cd9fd273ffb"
+angular@^1.0.8, angular@^1.7.9:
+  version "1.7.9"
+  resolved "https://registry.yarnpkg.com/angular/-/angular-1.7.9.tgz#e52616e8701c17724c3c238cfe4f9446fd570bc4"
 
 ansi-escapes@^1.1.0:
   version "1.4.0"