Please consider adding a CHANGES.md file or similar

[mlissner]

I'm working on some package upgrades, and I use dependabot to do them. If a project has CHANGES.md or uses the Github Releases feature, dependabot will summarize the changes made between versions. This makes upgrading a lot easier.

Beyond that, even without dependabot, having a list of changes between releases is really helpful. Since this project doesn't have that file, I had to go do a diff of the code itself to see what changed.

If it's welcome, I'd be happy to add a template CHANGES.md file to the project?

Thanks for the great package.