Prepare for release 0.4.0

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [0.4.0] - 2019-03-25
 ### Added
 - Calling `#dispatch` on tasks now allows to process tasks asynchronously
 
@@ -73,7 +73,8 @@ available.
 ### Added
 - Initial release.
 
-[Unreleased]: https://github.com/zenaton/zenaton-ruby/compare/v0.3.1...HEAD
+[Unreleased]: https://github.com/zenaton/zenaton-ruby/compare/v0.4.0...HEAD
+[0.3.1]: https://github.com/zenaton/zenaton-ruby/compare/v0.3.1...v0.4.0
 [0.3.1]: https://github.com/zenaton/zenaton-ruby/compare/v0.3.0...v0.3.1
 [0.3.0]: https://github.com/zenaton/zenaton-ruby/compare/v0.2.3...v0.3.0
 [0.2.3]: https://github.com/zenaton/zenaton-ruby/compare/v0.2.2...v0.2.3

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    zenaton (0.3.1)
+    zenaton (0.4.0)
       activesupport
       tzinfo-data
 

lib/zenaton/version.rb

@@ -2,5 +2,5 @@
 
 module Zenaton
   # This gem's current version
-  VERSION = '0.3.1'
+  VERSION = '0.4.0'
 end