[pigeon] Adds StructuredGenerator class and subclasses

packages/pigeon/CHANGELOG.md

@@ -1,3 +1,23 @@
+## 5.0.5
+
+* Adds writeApi method to Generator classes.
+
+## 5.0.4
+
+* Adds writeEnum method to Generator classes.
+
+## 5.0.3
+
+* Adds writeEnum method to Generator classes.
+
+## 5.0.2
+
+* Adds writeImports method to Generator classes.
+
+## 5.0.1
+
+* Adds writeHeaders method to Generator classes and updates tests to use new Generators.
+
 ## 5.0.0
 
 * Creates new Generator classes for each language.