What's Changed
* Fix flake8 configuration by chosak in https://github.com/cfpb/wagtail-sharing/pull/58
* Remove definition of default_app_config by chosak in https://github.com/cfpb/wagtail-sharing/pull/60
* Add support for Wagtail 4.2 by willbarton, chosak, and nickmoreton in https://github.com/cfpb/wagtail-sharing/pull/62
**Full Changelog**: https://github.com/cfpb/wagtail-sharing/compare/2.7...2.8