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

* Update pip to 19.0.3
* Update setuptools to 40.8.0
(cherry picked from commit 01e0f439)
Co-authored-by: Pradyun Gedam <pradyunsg@gmail.com>

Lib/ensurepip/__init__.py

@@ -12,9 +12,9 @@ import tempfile
 __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),

Misc/NEWS.d/next/Library/2019-03-06-13-21-33.bpo-35807.W7mmu3.rst

+Update ensurepip to install pip 19.0.3 and setuptools 40.8.0.