Update changelog

CHANGES.md

@@ -2,11 +2,13 @@ Unreleased - 4.0.0
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 * [BREAKING] Dropped support for matching jobs on ActiveJob's private API args, (e.g. `_aj_globalid` and `_aj_ruby2_keywords`). `_aj_globalid` can be replaced with the object itself, e.g. `have_enqueued_sidekiq_job(user)`.
 * [BREAKING] Dropped support for Ruby 2.6
-* [Possible breaking] Dropped support for Sidekiq 5
+* [BREAKING] Mocking Sidekiq::Batch is now _opt in_ (was opt-out) by default
+* [Possible breaking] Dropped support for Sidekiq <5
 * [Possible breaking] Dropped support for Rails 5
-* Clarified `have_enqueued_sidekiq_job` error message to make it clear that the "actual arguments" list is a list of argument-lists across all jobs.
-* Switched to GitHub Actions for CI
-* README updates to clarify new author and build links
+* Add Support for Sidekiq 7 (#192)
+* Clarified `have_enqueued_sidekiq_job` error message to make it clear that the "actual arguments" list is an array of argument-lists across all enqueued jobs. (#195)
+* Fix `in` and `at` evaluation to match Sidekiq (#194)
+* Fix `be_delayed` argument matcher (#196)
 
 3.1.0
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