Fixing dependency mismatch (vuejs#42)

Miguel Solano · yyx990803 · commit b09f68ecec90 · 2017-02-06T11:19:59.000-05:00
Docs misguide you into installing 2 which has the undefined path bug.
diff --git a/README.md b/README.md
@@ -9,7 +9,7 @@
 npm install vuex-router-sync
 
 # for usage with vue-router < 2.0:
-npm install vuex-router-sync@2
+npm install vuex-router-sync@3
 ```
 
 ``` js
