bpo-35807: Upgrade ensurepip bundled pip and setuptools (GH-12189)

* Update pip to 19.0.3
* Update setuptools to 40.8.0
diff --git a/Lib/ensurepip/__init__.py b/Lib/ensurepip/__init__.py
index 09c572d..526dfd0 100644
--- a/Lib/ensurepip/__init__.py
+++ b/Lib/ensurepip/__init__.py
@@ -8,9 +8,9 @@
 __all__ = ["version", "bootstrap"]
 
 
-_SETUPTOOLS_VERSION = "40.6.2"
+_SETUPTOOLS_VERSION = "40.8.0"
 
-_PIP_VERSION = "18.1"
+_PIP_VERSION = "19.0.3"
 
 _PROJECTS = [
     ("setuptools", _SETUPTOOLS_VERSION),