CHANGELOG.md in csb-0.3.1 vs CHANGELOG.md in csb-0.4.0

@@ -1,4 +1,9 @@
+## 0.4.0
+
+- Csb::Cols#initialize supports block arguments
+- Add Testing Helper
+
 ## 0.3.1
 
 - Refactor
 
 ## 0.3.0