pythonPackages.measurement: now python3 only
Upstream has dropped python2 support and updated their build dependencies as of
the 3.0 version; see here for changelog:
https://github.com/coddingtonbear/python-measurement/releases
Co-Authored-By: Jon <jonringer@users.noreply.github.com>
authored by Benjamin Hipple Jon and committed by Jon eed30dfa aafb982e