Bumped seiyria-bootstrap-slider dependency

Enables newer version to be installed via bower with new features like the tooltip position

Author: j-r-t

bower.json

@@ -22,7 +22,7 @@
     "tests"
   ],
   "dependencies": {
-    "seiyria-bootstrap-slider": "~v4.8",
+    "seiyria-bootstrap-slider": "~4.13",
     "angular": "~1.3.15||~1.4.0"
   }
 }