Bump required cflib version

Author: gemenerik

setup.py

@@ -90,7 +90,7 @@ def relative(lst, base=''):
         ],
     },
 
-    install_requires=['cflib>=0.1.26',
+    install_requires=['cflib>=0.1.27',
                       'setuptools',
                       'appdirs~=1.4.0',
                       'pyzmq~=26.0',