Maybe object versioning can get added as this gains more and more usage... That will really make this a library that IMHO is production worthy; large applicatio

Maybe object versioning can get added as this gains more and more usage... That will really make this a library that IMHO is production worthy; large applications can't be easily upgraded in one-go and having a library that helps with translating across versions would be super. https://github.com/marshmallow-code/marshmallow/issues/171 https://github.com/marshmallow-code/marshmallow/issues/171 (if anyone is interested).