Increase daemon protocol version for getSupportedPlatforms (#33980)

packages/flutter_tools/doc/daemon.md

@@ -250,6 +250,7 @@ See the [source](https://github.com/flutter/flutter/blob/master/packages/flutter
 
 ## Changelog
 
+- 0.5.0: Added `daemon.getSupportedPlatforms` command
 - 0.4.2: Added `app.detach` command
 - 0.4.1: Added `flutter attach --machine`
 - 0.4.0: Added `emulator.create` command

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

@@ -26,7 +26,7 @@ import '../run_hot.dart';
 import '../runner/flutter_command.dart';
 import '../vmservice.dart';
 
-const String protocolVersion = '0.4.2';
+const String protocolVersion = '0.5.0';
 
 /// A server process command. This command will start up a long-lived server.
 /// It reads JSON-RPC based commands from stdin, executes them, and returns