Update changelog for 0.4.0.

CHANGELOG.md

@@ -4,14 +4,38 @@ All notable changes to this project will be documented in this file.
 
 Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
 
+## Unreleased
 
-## 0.4.0 (Unreleased)
-> Released N/A
+### Added
 
-* N/A
+### Changed
 
-## 0.3.0
-> Released Nov 20, 2021
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+## [0.4.0] - 2022-11-27
+
+### Added
+
+- Allow LanguageTool command to be configured via customisable variable `flycheck-languagetool-server-command`.
+- Add a change log.
+
+### Changed
+
+- Make some warnings and error messages more verbose.
+- Broaden automated testing to more versions of Emacs.
+- Replace Cask with Eask.
+
+### Fixed
+
+- Support narrowed buffers.
+
+## [0.3.0] - 2021-11-20
 
 - **Incompatible change**: For better performance, a local LanguageTool server is now started once instead of repeatedly starting up the LanguageTool command-line tool for each check. See `flycheck-languagetool-server-jar` to set the path to the server JAR.
 - Reduce CPU usage.
@@ -22,13 +46,11 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 - Disable LanguageTool’s spell checker if `flyspell` is in use.
 - Chain to Flycheck’s built-in [Proselint](http://proselint.com/) checker.
 
-## 0.2.0
-> Released Jun 19, 2021
+## [0.2.0] - 2021-06-19
 
-* Allow checker to check when `buffer-file-name` is `nil`, see [#5](https://github.com/emacs-languagetool/flycheck-languagetool/issues/5)
-* Fix error when buffer is killed before checking
+- Allow checker to check when `buffer-file-name` is `nil`, see [#5](https://github.com/emacs-languagetool/flycheck-languagetool/issues/5)
+- Fix error when buffer is killed before checking
 
-## 0.1.0
-> Released Apr 5, 2021
+## [0.1.0] - 2021-04-05
 
-* Initial release.
+Initial release.