Log Message:
py-virtualenv: updated to 20.15.1

v20.15.1 (2022-06-28)
---------------------

Bugfixes - 20.15.1
~~~~~~~~~~~~~~~~~~
- Fix the incorrect operation when ``setuptools`` plugins output something into \ 
``stdout``.
- CPython3Windows creator ignores missing ``DLLs`` dir.

v20.15.0 (2022-06-25)
---------------------

Features - 20.15.0
~~~~~~~~~~~~~~~~~~
- Support for Windows embeddable Python package: includes \ 
``python<VERSION>.zip`` in the creator sources

Bugfixes - 20.15.0
~~~~~~~~~~~~~~~~~~
- Upgrade embedded setuptools to ``62.3.3`` from ``62.6.0`` and pip to \ 
``22.1.2`` from ``22.0.4``
- Use ``shlex.quote`` instead of deprecated ``pipes.quote`` in Python 3 - by \ 
:user:`frenzymadness`.
- Fix Windows PyPy 3.6