Update changelog for unreleased version

docs/CHANGELOG.md

@@ -6,6 +6,7 @@ The format is based on
 and this project adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+- [0.7.3 (UNRELEASED)](#073-UNRELEASED)
 - [0.7.2 (2021-07-26)](#072-2021-07-26)
 - [0.7.1 (2021-03-04)](#071-2021-03-04)
 - [0.7.0 (2021-02-28)](#070-2021-02-28)
@@ -23,6 +24,37 @@ and this project adheres to
 - [0.4.0 (2020-03-21)](#040-2020-03-21)
 
 
+## 0.7.3 (UNRELEASED)
+
+### Added
+
+  - [Keybindings page](KEYBINDINGS.md)
+
+  - When first starting Moment, offer to migrate config
+
+  - Foliage theme
+
+### Changed
+
+  - Renamed Mirage to Moment
+
+  - Default config, cache and data directories
+
+  - Default keybinds:
+    - quit is now Ctrl+Q
+    - reply is now Ctrl+R
+    - remove is now Ctrl+Shift+R
+    - "focus filter" is now Ctrl+K
+    - "previous message" is now Ctrl+I
+
+  - Default theme is now Foliage.qpl
+
+### Fixed
+
+  - Compatibility with Python 3.10
+
+  - Minor UI fixes
+
 ## 0.7.2 (2021-07-26)
 
 ### Added