changelog and version bump

Author: hellohuanlin

packages/pigeon/CHANGELOG.md

@@ -1,5 +1,10 @@
-## NEXT
+## 10.0.0
 
+* [swift] Avoids using `Any` to represent `Optional` in Swift.
+* [swift] **Breaking Change** A raw `List` (without generic type argument) in Dart will be 
+  translated into `[Any?]` (rather than `[Any]`) in Swift.
+* [swift] **Breaking Change** A raw `Map` (without generic type argument) in Dart will be 
+  translated into `[AnyHashable:Any?]` (rather than `[AnyHashable:Any]`) in Swift. 
 * Adds an example application that uses Pigeon directly, rather than in a plugin.
 
 ## 9.2.5

packages/pigeon/lib/generator_tools.dart

@@ -11,7 +11,7 @@ import 'ast.dart';
 /// The current version of pigeon.
 ///
 /// This must match the version in pubspec.yaml.
-const String pigeonVersion = '9.2.5';
+const String pigeonVersion = '10.0.0';
 
 /// 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: 9.2.5 # This must match the version in lib/generator_tools.dart
+version: 10.0.0 # This must match the version in lib/generator_tools.dart
 
 environment:
   sdk: ">=2.18.0 <4.0.0"