[pigeon] chore(readme): deprecated command of running pigeon (flutter#7761)

*Update outdated command in `README.md` of running [pigeon](https://pub.dev/packages/pigeon).*

Same as flutter#7709

Author: EchoEllet

packages/pigeon/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 22.4.2
+
+* Updates `README.md` to replace the deprecated `flutter pub run pigeon` command with `dart run pigeon`.
+
 ## 22.4.1
 
 * [dart] Fixes bug where special handling of ints is ignored if no custom types are used.

packages/pigeon/README.md

@@ -86,7 +86,7 @@ to the api to allow for multiple instances to be created and operate in parallel
 1) Make a ".dart" file outside of your "lib" directory for defining the
    communication interface.
 1) Run pigeon on your ".dart" file to generate the required Dart and
-   host-language code: `flutter pub get` then `flutter pub run pigeon`
+   host-language code: `flutter pub get` then `dart run pigeon`
    with suitable arguments. [Example](./example/README.md#Invocation).
 1) Add the generated Dart code to `./lib` for compilation.
 1) Implement the host-language code and add it to your build (see below).

packages/pigeon/lib/generator_tools.dart

@@ -14,7 +14,7 @@ import 'ast.dart';
 /// The current version of pigeon.
 ///
 /// This must match the version in pubspec.yaml.
-const String pigeonVersion = '22.4.1';
+const String pigeonVersion = '22.4.2';
 
 /// 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%3A%22p%3A+pigeon%22
-version: 22.4.1 # This must match the version in lib/generator_tools.dart
+version: 22.4.2 # This must match the version in lib/generator_tools.dart
 
 environment:
   sdk: ^3.3.0