docs: update release note

Author: yyforyongyu

release_notes.md

@@ -16,6 +16,9 @@ This file tracks release notes for the loop client.
 
 #### New Features
 
+* User-specified liquidity parameters are persisted on disk to enable the
+  liquidity manager's config to surive after a restart.
+
 #### Breaking Changes
 
 #### Bug Fixes

version.go

@@ -26,7 +26,7 @@ const semanticAlphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqr
 const (
 	// Note: please update release_notes.md when you change these values.
 	appMajor uint = 0
-	appMinor uint = 18
+	appMinor uint = 19
 	appPatch uint = 0
 
 	// appPreRelease MUST only contain characters from semanticAlphabet per