message: CHANGELOG: Add unit test entries
diff: @@ -12,6 +12,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  ## [Unreleased]
  ### Added
  +- Chat system access denial unit tests. [#989](https://github.com/geli-lms/geli/issues/989)
  +- A `TestHelper` class for shared API unit test functionality. [#989](https://github.com/geli-lms/geli/issues/989)
  ### Changed
  - Update mongoose to 5.2.x. [#1004](https://github.com/geli-lms/geli/pull/1004)
  @@ -21,6 +23,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  ### Fixed
  - Notifications for invisible courses and lectures will no longer be created. [#877](https://github.com/geli-lms/geli/issues/877)
  - EU-DSGVO: Export Chat User Data - Exclude Comments. [#998](https://github.com/geli-lms/geli/issues/998)
  +- Nondeterministic chat system unit test authorization failures. [#989](https://github.com/geli-lms/geli/issues/989)
  ### Security
  - Fixed multiple severe security issues of the chat system. [#989](https://github.com/geli-lms/geli/issues/989)
  