main/py3-jinja2: upgrade to 2.11.0
Changelog: https://github.com/pallets/jinja/blob/master/CHANGES.rst#version-2110
Set PYTHONPATH to avoid an ImportError while running check():
ImportError while loading conftest '/home/builder/aports/main/py3-jinja2/src/Jinja2-2.11.0/tests/conftest.py'.
tests/conftest.py:6: in <module>
from jinja2 import Environment
E ModuleNotFoundError: No module named 'jinja2'
Edited by Keith Maxwell