Updated CHANGELOG.md

Author: Mateusz Gostański

CHANGELOG.md

@@ -2,10 +2,11 @@
 
 All notable changes to `api-client` will be documented in this file
 
-## 3.0.2 - 2021-03-09
+## 3.1.0 - 2021-03-09
 
 - Bug fixed in OAuthToken
 - Added parsing datetime strings to Carbon objects in StraightKeyParser
+- Add GitHub Actions integration
 
 ## 3.0.1 - 2021-02-15