Bump to 0.2.10 release.

Also, allow analyzer 0.29.0-alpha.0.

R=nbosch@google.com

Review URL: https://codereview.chromium.org//2340463007 .
diff --git a/bin/format.dart b/bin/format.dart
index a8a00e2..0be795d 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 = "0.2.9+1";
+const version = "0.2.10";
 
 void main(List<String> args) {
   var parser = new ArgParser(allowTrailingOptions: true);
diff --git a/pubspec.lock b/pubspec.lock
index 76a5a30..450df1b 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -144,7 +144,7 @@
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.2"
+    version: "1.0.3"
   mime:
     description:
       name: mime
diff --git a/pubspec.yaml b/pubspec.yaml
index e5997ae..5c64c59 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,13 +1,13 @@
 name: dart_style
 # Note: See tool/grind.dart for how to bump the version.
-version: 0.2.10-dev
+version: 0.2.10
 author: Dart Team <misc@dartlang.org>
 description: Opinionated, automatic Dart source code formatter.
 homepage: https://github.com/dart-lang/dart_style
 environment:
   sdk: ">=1.8.0 <2.0.0"
 dependencies:
-  analyzer: '>=0.27.4 <0.29.0'
+  analyzer: '>=0.27.4 <=0.29.0-alpha.0'
   args: '>=0.12.1 <0.14.0'
   path: '>=1.0.0 <2.0.0'
   source_span: '>=1.1.1 <2.0.0'