Merging into Marshmallow

[rafenden]

Hey there, thanks for a very useful library!

Did you consider merging it into Marshmallow project?
I see this project as a basic functionality that should come with Marshmallow.

[rafenden]

Related issue from the Marshmallow project: marshmallow-code/marshmallow#267

[justanr]

I'd be alright for meeting it into marshmallow, though support for Python 2 could hinder that.

@sloria thoughts? I'm not sure on marshmallow's plans regarding Python 2 but 3.3 (the last version before enum) has been EOL'd

[austinbutler]

Looks like 3.3 support is dropped in 3.x: https://marshmallow.readthedocs.io/en/3.0/changelog.html#a1-2017-02-26

[lafrech]

See marshmallow-code/marshmallow#2017.