Move flake8 config to setup.cfg (jpadilla#372)

[ci skip]

Author: blueyed

runtests.py

@@ -15,7 +15,7 @@
  'fast': ['tests', '-q'],
 }
 
-FLAKE8_ARGS = ['rest_framework_jwt', 'tests', '--ignore=E501']
+FLAKE8_ARGS = ['rest_framework_jwt', 'tests']
 
 
 sys.path.append(os.path.dirname(__file__))

setup.cfg

@@ -1,2 +1,5 @@
 [wheel]
-universal = 1
+universal = 1
+
+[flake8]
+ignore = E501