Bump version and changelog

CHANGELOG.md

@@ -11,6 +11,16 @@ and this project aims to adhere to [Semantic Versioning](http://semver.org/spec/
 ### Removed <!-- for now removed features. -->
 ### Fixed <!-- for any bug fixes. -->
 
+## [0.4.0] - 2021-11-30
+### Fixed
+- Fix Ruby 3.0 kwarg compatibility issue when executing jobs enqueued via the
+  `Delayed::MessageSending` APIs (`.delay` and `handle_asynchronously`).
+### Changed
+- `Delayed::PerformableMethod` now splits `kwargs` out into a separate attribute, while still being
+  backwards-compatible with jobs enqueued via the previous gem version. This is an undocumented
+  internal API and is not considered a breaking change, but if you had previously relied on
+  `payload_object.args.last` to access keyword arguments, you must now use `payload_object.kwargs`.
+
 ## [0.3.0] - 2021-10-26
 ### Added
 - Add more official support for Rails 7.0 (currently alpha2). There were no gem conflicts, but this
@@ -43,6 +53,7 @@ and this project aims to adhere to [Semantic Versioning](http://semver.org/spec/
   ancestor repos (`delayed_job` and `delayed_job_active_record`), plus the changes from Betterment's
   internal forks.
 
+[0.4.0]: https://github.com/betterment/delayed/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/betterment/delayed/compare/v0.2.0...v0.3.0
 [0.2.0]: https://github.com/betterment/delayed/compare/v0.1.1...v0.2.0
 [0.1.1]: https://github.com/betterment/delayed/compare/v0.1.0...v0.1.1

delayed.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.require_paths  = ['lib']
   spec.summary        = 'a multi-threaded, SQL-driven ActiveJob backend used at Betterment to process millions of background jobs per day'
 
-  spec.version        = '0.3.0'
+  spec.version        = '0.4.0'
   spec.metadata       = {
     'changelog_uri' => 'https://github.com/betterment/delayed/blob/main/CHANGELOG.md',
     'bug_tracker_uri' => 'https://github.com/betterment/delayed/issues',