Change flake8 line max to 120
[flake8]
# ignoring new standards in flake8 after django 1.11 upgrade. Too many to handle right now
ignore=E722,E121,E226,E123,E241,E226,E126,W292,E305,E127,E741,E402
-max-line-length=100
+max-line-length=120
exclude=
.pycharm_helpers,
migrations,
