CHANGELOG.md in node_mutation-1.21.4 vs CHANGELOG.md in node_mutation-1.21.5

@@ -1,6 +1,10 @@
 # NodeMutation
 
+## 1.21.5 (2023-11-20)
+
+* Rewrite the process and test methods
+
 ## 1.21.4 (2023-10-28)
 
 * Update `Adapter` rbs
 
 ## 1.21.3 (2023-10-03)