Archive old changelog
Right now our Changelog file is super long and contains a lot of entries that are quite old. We shouldn't remove them, but find a way to archive old entries.
My current proposal would be to only keep the current major version (eg 1.0 and above) in the CHANGELOG.md and move older entries to the changes directory, where we can name them either CHANGELOG.{version}.md. The naming schema is open for discussions.