Recommend use venv instead of virtualenv

From the Python docs:
"Changed in version 3.5: The use of venv is now recommended for creating virtual environments."
-https://docs.python.org/3/library/venv.html

doc/en/goodpractices.rst

@@ -7,12 +7,12 @@ Good Integration Practices
 Install package with pip
 -------------------------------------------------
 
-For development, we recommend to use virtualenv_ environments and pip_
+For development, we recommend you use venv_ for virtual environments and pip_
 for installing your application and any dependencies
 as well as the ``pytest`` package itself. This ensures your code and
 dependencies are isolated from the system Python installation.
 
-First you need to place a ``setup.py`` file in the root of your package with the following minimum content::
+Next, place a ``setup.py`` file in the root of your package with the following minimum content::
 
     from setuptools import setup, find_packages