Update to latest versions.

@@ -15,9 +15,9 @@
   ],
   "dependencies": {
     "jquery": "",
-    "backbone": "~1.1.2",
+    "backbone": "",
     "backbone-nested-models": "git@gitlab.brainfood.com:brainfood/backbone-nested-models.git",
-    "underscore": "~1",
+    "underscore": "",
     "requirejs": "~2.1.17"
   }
 }

@@ -491,10 +491,6 @@ define(function(require) {
         },
         */
     });
-    var ItemCollection = Backbone.Collection.extend({
-        remove: function() {
-        }
-    });
     var Item = Facet.Item = Backbone.Model.extend({
         idAttribute: 'key',
         defaults: {
@@ -511,6 +507,11 @@ define(function(require) {
             return Item.__super__.initialize.apply(this, arguments);
         }
     });
+    var ItemCollection = Backbone.Collection.extend({
+        model: Item,
+        remove: function() {
+        }
+    });
 
     return Facet;
 });