CHANGELOG.md in attributor-5.0.2 vs CHANGELOG.md in attributor-5.1.0

@@ -1,12 +1,17 @@
 # Attributor Changelog
 
 ## next
 
+## 5.1
+
+* Added `Polymorphic` type. See [polymorphics.rb](spec/support/polymorphics.rb) for example usage.
+
 ## 5.0.2
 
 * Introduce the `Dumpable` (empty) module as an interface to indicate that instances of types that include it
-will respond to the `.dump` method, as a way to convert their internal substructure to primitive Ruby objects.    * Currently the only two directly dumpable types are Collection and Hash (with the caveat that there are several others that derive from them..i.e., CSV, Model, etc...)
+will respond to the `.dump` method, as a way to convert their internal substructure to primitive Ruby objects.
+  * Currently the only two directly dumpable types are Collection and Hash (with the caveat that there are several others that derive from them..i.e., CSV, Model, etc...)
   * The rest of types have `native_types` that are already Ruby primitive Objects.
 * Fixed Hash and Model requirements to treat nil values as missing keys (to be compatible with the `required: true` option on an attribute).
 
 ## 5.0.1