update changelog

Author: rajarshimaitra

CHANGELOG.md

@@ -6,7 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-- Add distinct `key-value-db` and `sqlite-db` features, keep default as `key-value-db`
+- Add distinct `key-value-db` and `sqlite-db` features, keep default as `sqlite`
+- Add new `bdk-cli node <command> [<args>]` to control the backend node deployed by
+  deployed by `regtest-*` features.
+- Add an integration testing framework in `src/tests/integration.rs`. This framework uses
+  the `regtest-*` feature to run automated testing with bdk-cli.
 
 ## [0.5.0]