update sortable

Author: sdorra

bower.json

@@ -40,7 +40,7 @@
     "angular": ">=1.4",
     "angular-bootstrap": "^1.3.0",
     "bootstrap": "^3.3.6",
-    "Sortable": "^1.2.1"
+    "Sortable": "^1.4.2"
   },
   "devDependencies": {
     "angular-mocks": ">=1.2",