CHANGELOG.md in dartsclone-0.2.3 vs CHANGELOG.md in dartsclone-0.3.0

@@ -1,4 +1,7 @@
+## 0.3.0
+- Add type declaration file: sig/dartsclone.rbs
+
 ## 0.2.3
 - Fix some codes and configulation files.
 
 ## 0.2.2
 - Refactor native extension codes considering garbage collection.