Add missing router sync

browser/vue-flow/package.json

@@ -51,6 +51,7 @@
     "vue-svg-loader": "^0.4.0",
     "vue-template-compiler": "^2.4.4",
     "vuex": "^3.0.1",
+    "vuex-router-sync": "^5.0.0",
     "webpack": "^3.6.0",
     "webpack-dev-server": "^2.9.1"
   }

browser/vue-flow/yarn.lock

@@ -5933,6 +5933,10 @@ vue@^2.5.11:
   version "2.5.13"
   resolved "https://registry.yarnpkg.com/vue/-/vue-2.5.13.tgz#95bd31e20efcf7a7f39239c9aa6787ce8cf578e1"
 
+vuex-router-sync@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/vuex-router-sync/-/vuex-router-sync-5.0.0.tgz#1a225c17a1dd9e2f74af0a1b2c62072e9492b305"
+
 vuex@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/vuex/-/vuex-3.0.1.tgz#e761352ebe0af537d4bb755a9b9dc4be3df7efd2"