[pigeon] revert changelog revert (#2995)

* revert changelog revert

* tense

* better changelog

packages/pigeon/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 4.2.15
+
+* Relocates generator classes. (Reverted)
+
 ## 4.2.14
 
 * [c++] Fixes reply sending non EncodableValue wrapped lists.

packages/pigeon/lib/generator_tools.dart

@@ -9,7 +9,7 @@ import 'dart:mirrors';
 import 'ast.dart';
 
 /// The current version of pigeon. This must match the version in pubspec.yaml.
-const String pigeonVersion = '4.2.14';
+const String pigeonVersion = '4.2.15';
 
 /// Read all the content from [stdin] to a String.
 String readStdin() {

packages/pigeon/pubspec.yaml

@@ -2,7 +2,7 @@ name: pigeon
 description: Code generator tool to make communication between Flutter and the host platform type-safe and easier.
 repository: https://github.com/flutter/packages/tree/main/packages/pigeon
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3Apigeon
-version: 4.2.14 # This must match the version in lib/generator_tools.dart
+version: 4.2.15 # This must match the version in lib/generator_tools.dart
 
 environment:
   sdk: ">=2.12.0 <3.0.0"