README.md in work_timer-0.2.2 vs README.md in work_timer-0.2.4

- old
+ new

@@ -1,6 +1,6 @@
 # work_timer
-
+[![CircleCI](https://circleci.com/gh/9sako6/work_timer.svg?style=svg)](https://circleci.com/gh/9sako6/work_timer)
 [![Maintainability](https://api.codeclimate.com/v1/badges/c1aa0d29cfb926decd44/maintainability)](https://codeclimate.com/github/9sako6/work_timer/maintainability)
 [![Gem Version](https://badge.fury.io/rb/work_timer.svg)](https://badge.fury.io/rb/work_timer)
 
 This gem measures the time.
 