Add missing requirement yarl for python >= 3.4
@@ -31,6 +31,7 @@ extras_require = {
':python_version in "2.4, 2.5, 2.6"':
['contextlib2', 'backport_collections', 'mock'],
':python_version in "2.7, 3.1, 3.2"': ['contextlib2', 'mock'],
+ ':python_version in "3.4, 3.5, 3.6"': ['yarl'],
}
