Go back to v2.2.0 + make blank lines in changelog consistent

Author: DanTup

CHANGELOG.md

@@ -1,8 +1,8 @@
-## 2.2.1
+## 2.2.0
+
 - Fix inconsistent line endings when inserting maps into a document using `\r\n`.
   ([#65](https://github.com/dart-lang/yaml_edit/issues/65))
 
-## 2.2.0
 - `AliasError` is changed to `AliasException` and exposed in the public API.
 
   All node-mutating methods on `YamlEditor`, i.e. `update()`, `appendToList()`,
@@ -17,6 +17,7 @@
 - Require Dart 2.19
 
 ## 2.1.0
+
 - **Breaking** `wrapAsYamlNode(value, collectionStyle, scalarStyle)` will apply
   `collectionStyle` and `scalarStyle` recursively when wrapping a children of
   `Map` and `List`.
@@ -30,18 +31,22 @@
   ([#23](https://github.com/dart-lang/yaml_edit/issues/23))
 
 ## 2.0.3
+
 - Updated the value of the pubspec `repository` field.
 
 ## 2.0.2
+
 - Fix trailing whitespace after adding new key with block-value to map
   ([#15](https://github.com/dart-lang/yaml_edit/issues/15)).
 - Updated `repository` and other meta-data in `pubspec.yaml`.
 
 ## 2.0.1
+
 - License changed to BSD, as this package is now maintained by the Dart team.
 - Fixed minor lints.
 
 ## 2.0.0
+
 - Migrated to null-safety.
 - API will no-longer return `null` in-place of a `YamlNode`, instead a
   `YamlNode` with `YamlNode.value == null` should be used. These are easily

pubspec.yaml

@@ -1,5 +1,5 @@
 name: yaml_edit
-version: 2.2.1
+version: 2.2.0
 description: A library for YAML manipulation with comment and whitespace preservation.
 repository: https://github.com/dart-lang/yaml_edit
 issue_tracker: https://github.com/dart-lang/yaml_edit/issues