Force a more recent version of backbone-undo to match backbone version

npm-shrinkwrap.json

@@ -105,7 +105,7 @@
               "dependencies": {
                 "graceful-fs": {
                   "version": "1.2.3",
-                  "from": "graceful-fs@>=1.0.0 <2.0.0",
+                  "from": "graceful-fs@>=1.2.0 <1.3.0",
                   "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-1.2.3.tgz"
                 },
                 "inherits": {
@@ -198,7 +198,7 @@
                 },
                 "esprima": {
                   "version": "1.0.4",
-                  "from": "esprima@>=1.0.2 <1.1.0",
+                  "from": "esprima@>=1.0.4 <1.1.0",
                   "resolved": "https://registry.npmjs.org/esprima/-/esprima-1.0.4.tgz"
                 }
               }
@@ -968,15 +968,8 @@
     },
     "backbone-undo": {
       "version": "0.2.5",
-      "from": "backbone-undo@0.2.5",
-      "resolved": "https://registry.npmjs.org/backbone-undo/-/backbone-undo-0.2.5.tgz",
-      "dependencies": {
-        "backbone": {
-          "version": "1.2.1",
-          "from": "backbone@>=1.0.0 <=1.2.1",
-          "resolved": "https://registry.npmjs.org/backbone/-/backbone-1.2.1.tgz"
-        }
-      }
+      "from": "cartodb/Backbone.Undo.js#c10e997",
+      "resolved": "git://github.com/cartodb/Backbone.Undo.js.git#c10e9977d22ecea1fabe894be650c78ac548911f"
     },
     "bootstrap-colorpicker": {
       "version": "2.3.3",

package.json

@@ -17,7 +17,7 @@
     "backbone": "1.2.3",
     "backbone-forms": "0.14.0",
     "backbone-model-file-upload": "1.0.0",
-    "backbone-undo": "0.2.5",
+    "backbone-undo": "cartodb/Backbone.Undo.js#c10e997",
     "bootstrap-colorpicker": "2.3.3",
     "browserify-shim": "3.8.12",
     "camshaft-reference": "<2.0",