readthedocs: add enum to install
@@ -53,6 +53,7 @@ REQS = ['click>=7.0',
# in readthedocs documentation building environment.
if os.environ.get('READTHEDOCS') == 'True':
REQS = ['future>=0.16.0',
+ 'enum34>=1.0.4',
'pyyaml>=3.10',
]
