Fix marshmallow version for superset 5.0.0

[gonzalo]

Current marshmallow version 4.0.0 breaks the initialization of superset. Downgrading to 3.23.1 fix the issue

[gonzalo]

@amancevice I don't know if I did this pull request properly. Feel free to indicate how it has to be done.

[amancevice]

this is fine, I'll fix the Pipfile after merging. Thanks!

[gonzalo]

You welcome. Should we expect a new release soon? I've a bunch of deployments pending to upgrade after you official release. I can use my own image pushed to private repository, but I would like to keep on yours.
I've observed that your tests is taking a lot of time during building wheels of pandas. It happened similar to me on local (about 10 min on a powerful machine). Is this the reason for not publishing a new release?
(of course, I respect your freedom to dedicate the time you consider to this project...)

[amancevice]

yeah the build was taking so long I canceled it while I investigate how to fix it. The image builds fine on my arm64 Apple machine so I assume it's something to do with GitHub's x86_64 build machines. Feel free to open a PR if you figure it out but I'm moving a little slowly this week + next as I'm on vacation