add gif animation

Author: Stephan Dilly

CHANGELOG.md

@@ -6,6 +6,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2020-05-25
+
 ### Added
 - stashing support (save,apply,drop) ([#3](https://github.com/extrawurst/gitui/issues/3))
 
@@ -18,6 +20,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixes
 - panic on small terminal width ([#72](https://github.com/extrawurst/gitui/issues/72))
 
+![](assets/stashing.gif)
+
 ## [0.3.0] - 2020-05-20
 
 ### Added