Merge #1695

1695: Update CHANGELOG for recent database work r=mergify[bot] a=tcharding

No update to the changelog was done during any of the database PRs.  Now that the database implementation is merged we should mention it in the changelog.

Co-authored-by: Tobin C. Harding <[email protected]>
Co-authored-by: Lucas Soriano <[email protected]>

Author: 3 people

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- Added persistent storage to cnd, now we save swaps to an Sqlite database when they are requested and accepted.
+
 ## [0.4.0] - 2019-11-26
 
 ### Changed