- https://b13.com/core-insights/typo3-and-composer-weve-come-a-long-way
- https://github.com/garris/BackstopJS/issues/1300
- https://www.facebook.com/groups/250938618364487/posts/3884850938306552/?__cft__[0]=AZUNySrcgO9uE54yTGYOyVgJn3KNRcqtP--0_anA3JXuzDv3WZUzoQZnbSlYnhDZtO5QZ1odnwYYt7KsfoGowXLeMWJPYEioX6MHUBCdSRbM_KK2Qhpg3xB3Ji4hrDPJ5XHnW688mLw_I6_okv7RG0dpUppAnMFxKT3dMykT3mXcXBUs1N2wibKBDKb8unPAALBCsvwsR8Q4uYfclxti28t_&__tn__=%2CO%2CP-R
- https://github.com/SSFGizmo/direct_mail/tree/11.x