Update snippets.md

Vuex 기반의 할일 목록 예제 추가.
Bootstrap 활용

Author: usolkim

snippets.md

@@ -45,3 +45,4 @@ Vue가 포함된 [JsFiddle](https://jsfiddle.net/changjoo_park/bs3Lx0Lq/)에서
 - [vue-router lazy loading](https://jsfiddle.net/gongzza/qgujfsy0/) - [@gongzza](https://github.com/gongzza/)
 - [vue-router re-rendering](https://jsfiddle.net/plpot/zy6o0nr1/) - [@usolkim](https://github.com/usolkim/)
 - [vue-router 접근 권한 체크 예제](https://jsfiddle.net/plpot/sea55bw9/) - [@usolkim](https://github.com/usolkim/)
+- [Vuex 기반 To Do List 예제 (with bootstrap)](https://jsfiddle.net/plpot/swhc23zn/) - [@usolkim](https://github.com/usolkim/)