CHANGELOG.md in act-fluent-logger-rails-0.1.10 vs CHANGELOG.md in act-fluent-logger-rails-0.2.0

@@ -1,4 +1,8 @@
+## 0.2.0 / Mar 20 2016
+
+* Add severity_key parameter. Is is The key of severity(DEBUG, INFO, WARN, ERROR).
+
 ## 0.1.10 / Dec 23 2015
 
 * flush immediately.
 
 ## 0.1.9 / Dec 16 2015