Update README

Author: dcb9

README.md

@@ -7,12 +7,13 @@ It includes a `Cache` and `Session` storage handler in redis.
 
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+[![Test Coverage](https://codeclimate.com/github/dcb9/yii2-phpredis/badges/coverage.svg)](https://codeclimate.com/github/dcb9/yii2-phpredis/coverage)
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-**<font color="red">Notice: THIS REPO DID NOT SUPPORT ACTIVE RECORD.</font>**
+**Notice: THIS REPO DID NOT SUPPORT ACTIVE RECORD.**
 
 Requirements
 ------------