* Updates are no longer available for CentOS Stream 8 since the end of May 2024
* Updates will cease being available for CentOS 7 at the end of June 2024
_And_:
* Remove Fedora 38
* Fix `openSUSE Leap 15` Docker build's default GCC no longer compiles `Mapnik` latest
* C++17 is now required, so a newer GCC will be installed
* Fix for coverage capturing with LCOV 2.1
* Seems to currently only exist on macOS