📝 Add v0.4.0 to CHANGELOG

Author: alexlee-dev

CHANGELOG.md

@@ -5,6 +5,16 @@ 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).
 
+## [0.4.0] - _Unreleased_
+
+### Added
+
+### Changed
+
+### Removed
+
+### Fixed
+
 ## [0.3.0] - 2020-05-26
 
 ### ✏️ Application Name in Template Files