Description of problem:

mailemerge has an unnecessary dependency on the configparser package.
This is being picked up by the dependency generator because upstream does not have a version dependency on the requirement.

Steps to Reproduce:
dnf repoquery --releasever=rawhide --disablerepo=* --enablerepo=fedora --requires python3-mailmerge --refresh | grep configparser

Please create a patch to remove configparser from install_requires in setup.py when building for Python 3.