requests 2.3 compat

vcr/stubs/__init__.py

@@ -285,6 +285,9 @@ class VCRConnection:
             self.real_connection.sock = value
 
     def __init__(self, *args, **kwargs):
+        if six.PY3:
+            kwargs.pop('strict', None) # apparently this is gone in py3
+
         # need to temporarily reset here because the real connection
         # inherits from the thing that we are mocking out.  Take out
         # the reset if you want to see what I mean :)