Distutils: extras_require

[svaningelgem]

Hello,

It would be nice to be able to set the "extras_require" in the distutils plugin somehow:

This is especially nice when making a pypi package so you can have additional dependencies baked into it without jumping through a lot of hoops.

What I do at the moment is an after-package step that re-writes the setup.py file. Works fine, but is not very nicely integrated into the pybuilder experience imho.

Thanks