Thanks, but that is not really what I was looking for.
Since Github uses Git tags to create releases, the message attached to each release is determined by the tagged commit's message. Even in cases where the message is not just "Updated package version", it does not include any changes that might have happened in other untagged commits. With the additional limitation that there are no releases for versions before 7.2.1, the Releases page is actually less useful than manually looking at every commit.