React: Upgrade deps to 0.12

examples/react/bower.json

@@ -4,6 +4,6 @@
   "dependencies": {
     "todomvc-common": "~0.1.7",
     "director": "~1.2.0",
-    "react": "~0.11.0"
+    "react": "~0.12.0"
   }
 }