Expose new pub outdated command (#53251)

packages/flutter_tools/lib/src/commands/packages.dart

@@ -26,6 +26,7 @@ class PackagesCommand extends FlutterCommand {
     addSubcommand(PackagesForwardCommand('version', 'Print Pub version'));
     addSubcommand(PackagesForwardCommand('uploader', 'Manage uploaders for a package on pub.dev'));
     addSubcommand(PackagesForwardCommand('global', 'Work with Pub global packages'));
+    addSubcommand(PackagesForwardCommand('outdated', 'Analyze dependencies to find which ones can be upgraded', requiresPubspec: true));
     addSubcommand(PackagesPassthroughCommand());
   }
 

packages/flutter_tools/test/commands.shard/permeable/packages_test.dart

@@ -520,5 +520,18 @@ void main() {
       BotDetector: () => const AlwaysTrueBotDetector(),
       Pub: () => const Pub(),
     });
+
+    testUsingContext('outdated', () async {
+      await createTestCommandRunner(PackagesCommand()).run(<String>['packages', 'outdated']);
+      final List<String> commands = mockProcessManager.commands;
+      expect(commands, hasLength(2));
+      expect(commands[0], matches(r'dart-sdk[\\/]bin[\\/]pub'));
+      expect(commands[1], 'outdated');
+    }, overrides: <Type, Generator>{
+      ProcessManager: () => mockProcessManager,
+      Stdio: () => mockStdio,
+      BotDetector: () => const AlwaysTrueBotDetector(),
+      Pub: () => const Pub(),
+    });
   });
 }