webkitgtk library was deprecated for a while on Fedora and will not be shipped anymore on Fedora 43

[ycollet]

webkitgtk will not be shipped anymore on Fedora 43.
Is it possible to build cmajor without webkitgtk ?

[cesaref]

https://fedoraproject.org/wiki/Changes/Remove_webkit2gtk-4.0_API_Version

It looks like the 4.1 version is still supported. What i propose to do is move the generated cmake files across to a system that uses either 4.0 or 4.1, depending on what is installed, and to by default build with 4.1 for x64 releases. We have older systems using 4.0 for the moment, so i'll keep support for these.