Update CHANGELOG.md

Update CHANGELOG.md

Update CHANGELOG.md

Update CHANGELOG for new minor releases (#1074)

First version should be 1. (#758)

Prepare 3.3.0 release

Prepare 3.2.0 release

Prepare 3.1.0 release

Prepare 3.0.0 (stable) release \o/

Prepare 3.0.0-alpha3 release