make urllib3 min requirement explicit

setup.py

@@ -38,7 +38,7 @@ META = {
             'pytest>=2.4',
             'httplib2',
             'requests>=2.0.1',
-            'urllib3',
+            'urllib3>=1.11.0',
         ],
     },
 }

wsgi_intercept/__init__.py

@@ -120,7 +120,7 @@ Additional documentation is available on `Read The Docs`_.
 """
 from __future__ import print_function
 
-__version__ = '1.2.1'
+__version__ = '1.2.2'
 
 
 import sys