Oops. Fix version reported by "--version".

R=nweiz@google.com

Review URL: https://codereview.chromium.org//2256503002 .
diff --git a/bin/format.dart b/bin/format.dart
index a25680e..72182bf 100644
--- a/bin/format.dart
+++ b/bin/format.dart
@@ -14,7 +14,7 @@
 import 'package:dart_style/src/source_code.dart';
 
 // Note: The following line of code is modified by tool/grind.dart.
-const version = "0.2.8";
+const version = "0.2.9+1";
 
 void main(List<String> args) {
   var parser = new ArgParser(allowTrailingOptions: true);
diff --git a/pubspec.yaml b/pubspec.yaml
index 1dca374..b501bcb 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: dart_style
 # Note: See tool/grind.dart for how to bump the version.
-version: 0.2.9
+version: 0.2.9+1
 author: Dart Team <misc@dartlang.org>
 description: Opinionated, automatic Dart source code formatter.
 homepage: https://github.com/dart-lang/dart_style