chore(build): upgrade devDependencies

Upgrade dependencies that are safe to upgrade with no changes needed
in any configuration.

Author: chrisirhc

package.json

@@ -9,9 +9,6 @@
     "url": "https://github.com/angular-ui/bootstrap.git"
   },
   "devDependencies": {
-    "angular": "^1.3.15",
-    "angular-mocks": "^1.3.15",
-    "angular-sanitize": "^1.3.15",
     "grunt": "^0.4.5",
     "grunt-contrib-concat": "^0.5.1",
     "grunt-contrib-copy": "^0.8.0",