bpo-38488: Upgrade bundled versions of pip & setuptools (GH-20491)

diff --git a/Lib/test/test_venv.py b/Lib/test/test_venv.py
index 44c6219..ef6d7bd 100644
--- a/Lib/test/test_venv.py
+++ b/Lib/test/test_venv.py
@@ -513,7 +513,7 @@
         #    executing pip with sudo, you may want sudo's -H flag."
         # where $HOME is replaced by the HOME environment variable.
         err = re.sub("^(WARNING: )?The directory .* or its parent directory "
-                     "is not owned by the current user .*$", "",
+                     "is not owned or is not writable by the current user.*$", "",
                      err, flags=re.MULTILINE)
         self.assertEqual(err.rstrip(), "")
         # Being fairly specific regarding the expected behaviour for the