Dimitrios Slamaris

Hi, thank you for maintaining marshmallow-jsonschema! Are there any plans to accept this Pull request? Just came across the need to have that, started to write a handler and then...

One remark: For the following Pipfile: https://github.com/dim0x69/pipenvbug/blob/main/Pipfile "editable = true" is also ignored for [dev-packages]. The pacakge is always installed in a non-editable way.