Bump angular from 1.5.8 to 1.8.3

Bumps [angular](https://github.com/angular/angular.js) from 1.5.8 to 1.8.3.
- [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/v1.5.8...v1.8.3)

---
updated-dependencies:
- dependency-name: angular
  dependency-type: direct:development
...

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

package.json

@@ -9,7 +9,7 @@
   "packages": {},
   "dependencies": {},
   "devDependencies": {
-    "angular": "1.5.8",
+    "angular": "1.8.3",
     "angular-chart.js": "1.0.0-alpha6",
     "angular-strap": "2.3.8",
     "angular-ui-router": "0.3.1",