fix pullStanza not saving conduit state

Was using withStream' instead of withStream

source/Network/Xmpp/Stream.hs

@@ -393,7 +393,7 @@ pullUnpickle p = do
 
 -- | Pulls a stanza (or stream error) from the stream.
 pullStanza :: TMVar Stream -> IO (Either XmppFailure Stanza)
-pullStanza = withStream' $ do
+pullStanza = withStream $ do
     res <- pullUnpickle xpStreamStanza
     case res of
         Left e -> return $ Left e