* Drop patches no longer required because they are fixed by upstream cmake changes: mathgl-no-default-qt.patch, mathgl-fix-python-module-path.patch
* Drop pinning of numpy to version 1; numpy2 supported now.
* Switch to Qt6; obsolete libmgl-qt5-8 package with libmgl-qt-8.
* Switch over BuildRequires to pkgconfig based ones where possible.
OBS-URL: https://build.opensuse.org/package/show/science/mathgl?expand=0&rev=129
