Merge pull request #1864 from cherrypy/dependabot/pip/pytest-gte-5.3.5-and-lt-6.1.0

Update pytest requirement from <5.4.0,>=5.3.5 to >=5.3.5,<6.1.0

Set the default role in Sphinx to "any"

Adjust docs banner to indicate that Py 2 is EOL

Update pytest requirement from <5.4.0,>=5.3.5 to >=5.3.5,<5.5.0

Merge remote-tracking branch 'origin/pr/1851'