Bump angular from 1.3.20 to 1.7.8

Bumps [angular](https://github.com/angular/angular.js) from 1.3.20 to 1.7.8.
- [Release notes](https://github.com/angular/angular.js/releases)
- [Changelog](https://github.com/angular/angular.js/blob/master/CHANGELOG.md)
- [Commits](angular/angular.js@v1.3.20...v1.7.8)

Closes #32

package.json

@@ -40,7 +40,7 @@
   },
   "dependencies": {
     "@babel/polyfill": "^7.4.4",
-    "angular": "1.3.20",
+    "angular": "1.7.8",
     "angular-bootstrap-npm": "^0.13.4",
     "angular-gettext": "2.3.11",
     "angular-route": "1.3.20",