[PRQ#68655] Merge Request for arpack++

[notify]

envolution [1] filed a request to merge arpack++ [2] into arpackpp
[3]:

This is the current active fork

[1] https://aur.archlinux.org/account/envolution/
[2] https://aur.archlinux.org/pkgbase/arpack++/
[3] https://aur.archlinux.org/pkgbase/arpackpp/