fix requests 2.20.1 has requirement idna<2.8,>=2.5, but you'll have idna 2.8 which is incompatible.

Author: Francisco Javier Franco Algarrada

setup.py

@@ -85,6 +85,8 @@
         "setuptools>=36.2.0",
         #Fixing this dependency due to: pytest 3.6.4 has requirement pluggy<0.8,>=0.5, but you'll have pluggy 0.8.0 which is incompatible.
         "pluggy==0.7.1",
+        #Fixing this dependency due to: requests 2.20.1 has requirement idna<2.8,>=2.5, but you'll have idna 2.8 which is incompatible.
+        "idna==2.7",
         "tox==2.7.0",
         "twine",
     ],