Bump to 2.2.1. (#1081)

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7020d83..ae28abd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# 2.2.1-dev
+# 2.2.1
 
 * Require `package:analyzer` version `2.6.0`.
 * Use `NamedType` instead of `TypeName`.

lib/src/cli/formatter_options.dart

diff --git a/lib/src/cli/formatter_options.dart b/lib/src/cli/formatter_options.dart
index 8d7b120..210247f 100644
--- a/lib/src/cli/formatter_options.dart
+++ b/lib/src/cli/formatter_options.dart
@@ -13,7 +13,7 @@
 import 'summary.dart';
 
 // Note: The following line of code is modified by tool/grind.dart.
-const dartStyleVersion = '2.2.0';
+const dartStyleVersion = '2.2.1';
 
 /// Global options that affect how the formatter produces and uses its outputs.
 class FormatterOptions {

pubspec.yaml

diff --git a/pubspec.yaml b/pubspec.yaml
index 9ef827c..52ff54f 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: 2.2.1-dev
+version: 2.2.1
 description: >-
   Opinionated, automatic Dart source code formatter.
   Provides an API and a CLI tool.