Log Message:
py-parsel: updated to 1.4.0

1.4.0:
* Selector and SelectorList can't be pickled because
  pickling/unpickling doesn't work for lxml.html.HtmlElement;
  parsel now raises TypeError explicitly instead of allowing pickle to
  silently produce wrong output. This is technically backwards-incompatible
  if you're using Python < 3.6.