example code broken when installed from pypi

[jmlapre]

Installing this package with pip and trying to run the example on the homepage I get the following errors:

Import "pysitemap.parsers.lxml_parser" could not be resolved "ProactorEventLoop" is not a known member of module ".windows_events"

[johanjohan]

dito

[Etrama]

Same Edit: Github version still works.