$router.push({query: this.myarray}) not updating the URL

### Vue.js / vue-router versions
2.1.2

### Reproduction Link
http://jsfiddle.net/ub9e33fm/2/

### Steps to reproduce
1. Click first link
2. Click second link: see the difference in printed vars

### What is Expected?
Clicking the second link will also update `this.$route.query`

### What is actually happening?
`this.$route.query` is not updated