Changelog: add release 1.0.4

[atomist:generated] [atomist-skill:atomist/keep-a-changelog-skill]

Author: atomist-bot

CHANGELOG.md

@@ -5,7 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## [Unreleased](https://github.com/atomist-skills/npm-skill/compare/1.0.3...HEAD)
+## [Unreleased](https://github.com/atomist-skills/npm-skill/compare/1.0.4...HEAD)
+
+## [1.0.4](https://github.com/atomist-skills/npm-skill/compare/1.0.3...1.0.4) - 2021-04-01
 
 ## [1.0.3](https://github.com/atomist-skills/npm-skill/compare/1.0.2...1.0.3) - 2020-12-07