Bump angular-sanitize from 1.7.2 to 1.7.3 in /js

Bumps [angular-sanitize](https://github.com/angular/angular.js) from 1.7.2 to 1.7.3.
- [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/v1.7.2...v1.7.3)

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

js/package.json

@@ -13,7 +13,7 @@
     "angular-animate": "^1.7.2",
     "angular-file-upload": "^2.5.0",
     "angular-markdown-it": "^0.6.1",
-    "angular-sanitize": "^1.7.2",
+    "angular-sanitize": "^1.7.3",
     "babel-polyfill": "^6.26.0",
     "markdown-it": "^8.4.2",
     "markdown-it-link-target": "^1.0.2",