include vuex-router-sync dep

package.json

@@ -20,7 +20,8 @@
     "vue": "^2.0.0-beta.7",
     "vue-router": "^2.0.0-rc.2",
     "vue-server-renderer": "^2.0.0-beta.7",
-    "vuex": "^2.0.0-rc.4"
+    "vuex": "^2.0.0-rc.4",
+    "vuex-router-sync": "^3.0.0"
   },
   "devDependencies": {
     "babel-core": "^6.0.0",