Update CHANGELOG.md

Author: jcheron

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 ## [Unreleased]
+- Nothing
+## [1.2.8] - 2019-08-01
 ### Changed
 - `model` (`create-model`) command
   - added parameter `d`(`database`): the database connection name defined in config file (use default connection if absent)