[Cython] Dropping support for Python 3.2

[Stefan Behnel]

Stefan Behnel schrieb am 25.08.2017 um 22:14:
> Hi all,
> 
> the release branch still builds ok with Python 3.2, but master doesn't, and
> I'd rather not spend my time on fixing that. Python 3.2 has reached its
> final end-of-life in February 2016, so it's really dead for good now.
> 
> https://www.python.org/dev/peps/pep-0392/
> 
> I'm not really expecting any objections. ;) Unless someone stands up to
> invest time into making all tests pass in Py3.2 again, I'll rip out the
> Py3.2-only usage of 2to3 from setup.py during the next weeks, and also the
> small set of special cases here and there in the C code.

Changes are here:

https://github.com/cython/cython/pull/1844

Stefan