Adopt the Keep a Changelog style

CHANGELOG.md

@@ -1,28 +1,50 @@
-# Unreleased
+# Changelog
 
-## Added
+All notable changes to the Zee text editor are documented in this file. The
+format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-- Change TAB to use the mode-specific indentation config (#49)
+## Unreleased
+
+### Added
+
+- Add a configuration parameter for trimming whitespace on save
+  [#60](https://github.com/zee-editor/zee/pull/60)
+- Change TAB to use the mode-specific indentation config
+  [#49](https://github.com/zee-editor/zee/pull/49)
 - A new configuration system with a new file `config.ron` was introduced. The
   available modes and tree sitter parsers are now configurable at runtime,
-  without having to rebuild the editor. (#29)
+  without having to rebuild the editor
+  [#29](https://github.com/zee-editor/zee/pull/29)
 - The ability to specify the theme by name rather than index in the
-  configuration file
+  configuration file [#33](https://github.com/zee-editor/zee/pull/33)
 - Added a changelog to be updated timely as PRs are merged
+  [#49](https://github.com/zee-editor/zee/pull/49)
 
-## Breaking
+### Fixed
 
--
+- Actually use the theme specified in the configuration file
+  [#32](https://github.com/zee-editor/zee/pull/32)
+- Re-enable tab entry and ensure the cursor is moved the correct width
+  [#31](https://github.com/zee-editor/zee/pull/31)
 
-## Bug Fixes
+## v0.3.2 - 2022-04-23
 
-- Actually use the theme specified in the configuration file.
-- Re-enable tab entry and ensure the cursor is moved the correct width (#31)
+TODO: write changelog entries for all released versions of zee
 
-# v0.3.2 and before
+### Changed
 
 - The tree sitter parsers are now linked dynamically and built by `zee` itself
   rather than as part of the build process. In the future, this will enable
   configuring the tree sitters parser.
 
-TODO: write some more general notes about the early days of zee
+## 0.3.0 - 2022-04-16
+
+## 0.2.1 - 2022-04-10
+
+## 0.2.0 - 2022-04-10
+
+## 0.1.2 - 2020-03-30
+
+## 0.1.1 - 2020-03-15
+
+## 0.1.0 - 2020-03-22