I see a [0.5.1](https://github.com/lyft/pynamodb-attributes/releases/tag/v0.5.1) release in GitHub but the latest version that appears to be available on PyPI is [0.5.0](https://pypi.org/project/pynamodb-attributes/0.5.0/#history),
I see a 0.5.1 release in GitHub but the latest version that appears to be available on PyPI is 0.5.0,