Require a minimum setuptools version for Python 3.
When the setuptools_dso module is used having older versions of
setuptools installed, the wheel module (one of its dependencies)
sets up a handler for the root logging that writes to stdout
(https://github.com/pypa/wheel/issues/622).
This breaks the expected output of the programs, and thus the
wendeling.core tests.
However, if setuptools.logging is available, wheel will use it
instead and it won't set up a handler.
Thus, I added a explicit dependency to a version of setuptools above
60.2 for Python 3, as that is the first version that provides this
module.