• Fixed bulk_create_with_history support for HistoryRecords with relation_name attribute (gh-591)
• Added support for bulk_create_with_history for databases different from PostgreSQL (gh-577)
• Fixed DoesNotExist error when trying to get instance if object is deleted (gh-571)
• Fix model_to_dict to detect changes in a parent model when using
  inherit=True (backwards-incompatible for users who were directly
  using previous version) (gh-576)
• Use an iterator for clean_duplicate_history (gh-604)
• Add support for Python 3.8 and Django 3.0 (gh-610)