message: update CHANGELOG for 0.8.0
diff: 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
  -the [Python form of Semantic
  -Versioning](https://www.python.org/dev/peps/pep-0440/).
  +The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to the [Python form of Semantic Versioning](https://www.python.org/dev/peps/pep-0440/).
  For reference, the possible headings are:
  @@ -18,7 +15,35 @@ For reference, the possible headings are:
  - `External Contributors` to list all external contributors.
  - `Notes` for notes regarding this particular release.
  -## [Unreleased]
  +## [unreleased]
  +
  +## [0.8.0] - 2020-04-08
  +
  +### Added
  +
  +- New tutorial for the Python SDK (https://github.com/xainag/xain-fl/pull/355)
  +- Swagger description of the REST API (https://github.com/xainag/xain-fl/pull/345), and is published at https://xain-fl.readthedocs.io/en/latest/ (https://github.com/xainag/xain-fl/pull/358)
  +- The Python examples now accepts additional parameters (model size, heartbeat period, verbosity, etc.) (https://github.com/xainag/xain-fl/pull/351)
  +- Publish docker images to dockerhub
  +
  +### Security
  +
  +- Stop using `pickle` for messages serialization
  + (https://github.com/xainag/xain-fl/pull/355). `pickle` is insecure
  + and can lead to remote code execution. Instead, the default
  + aggregator uses `numpy.save()`.
  +
  +### Fixed
  +
  +- The documentation has been updated at https://xain-fl.readthedocs.io/en/latest/ (https://github.com/xainag/xain-fl/pull/358)
  +- Document aggregator error on Darwin platform (https://github.com/xainag/xain-fl/pull/365/files)
  +
  +### Changed
  +
  +- Simplified the Python SDK API (https://github.com/xainag/xain-fl/pull/355)
  +- Added unit tests for the coordinator and aggregator (https://github.com/xainag/xain-fl/pull/353), (https://github.com/xainag/xain-fl/pull/352)
  +- Refactor the metrics store (https://github.com/xainag/xain-fl/pull/340)
  +- Speed up the docker builds (https://github.com/xainag/xain-fl/pull/348)
  ## [0.7.0] - 2020-03-25
  