bump the deps

package.json

@@ -17,10 +17,10 @@
     "lru-cache": "^4.0.1",
     "serialize-javascript": "^1.3.0",
     "serve-favicon": "^2.3.0",
-    "vue": "^2.0.0-beta.6",
-    "vue-router": "^2.0.0-rc.1",
-    "vue-server-renderer": "^2.0.0-beta.6",
-    "vuex": "^2.0.0-rc.3"
+    "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"
   },
   "devDependencies": {
     "babel-core": "^6.0.0",