In setup.py, remove use of codecs.open, stop requiring 'six' in install_requires, update python_requires, remove extras_require Python 2 only requirement of contextdecorator, and update classifiers
In README.rst, update to "Python 3.4+ supported."
In requirements.in, remove contextdecorator, futures pin, and recompile
In tox.ini, stop testing on Python 2
In setup.cfg, remove isort's add_imports for __future__ imports, and remove universal wheel building
__future__importssixsetup.py, remove use ofcodecs.open, stop requiring 'six' ininstall_requires, updatepython_requires, removeextras_requirePython 2 only requirement ofcontextdecorator, and updateclassifiersREADME.rst, update to "Python 3.4+ supported."requirements.in, removecontextdecorator,futurespin, and recompiletox.ini, stop testing on Python 2setup.cfg, remove isort'sadd_importsfor__future__imports, and remove universal wheel building