2.0.0a6

• Extend captor to be used as a rest matcher

  E.g., support

  args = captor()
  when(freud).says(*args).thenReturn("Yes.")
  assert freud.says("Are", "you", "dreaming?") == "Yes."
  assert args.value == ("Are", "you", "dreaming?")
  # or
  kwargs = captor()
  when(freud).does(**kwargs).thenReturn(False)
  

• Added call_captor

  call = call_captor()
  when(mock).do(call).thenReturn("ok")
  mock.do(1, 2, x=3)
  assert call.value == ((1, 2), {"x": 3})
  

• Added patch_attr and patch_dict for non-callable monkeypatch-style use cases
  (e.g. sys.stdout, sys.argv, and environment/config dictionaries) with
  context-manager support and restoration through unstub.

  E.g.

  patch_attr("sys.argv", ["foo", "bar"])
  with patch_attr("sys.stdout", StringIO()) as stdout: ...
  with patch_dict(os.environ, {"user": "bob"}): ...
  

• Added explicit partial-unstub targeting by host + attribute name.
  This complements method-reference partial unstub (e.g. unstub(cat.meow))
  and supports tuple form and shorthand form, including multiple attributes
  in one call.

  E.g.

  unstub(cat.meow)
  unstub((cat, "meow"))
  unstub(cat, "meow")
  unstub((cat, "meow"), (os.path, "exists"))
  

• Also implemented unstub("os.path")