CRAN update - Fortran compilation issues Fedora/macOS

[khufkens]

prepare for release:

• [x] Check CRAN issues (ISSUES)
• [x] Update DESCRIPTION - version increment!
• [x] Update / check NEWS.md
• [x] Update cran-comments.md for release
• [x] urlchecker::url_check()
• [x] devtools::check(document = FALSE)
• [x] rhub::check_for_cran()
• [x] rhub::check_on_fedora()
• [x] rhub::check_on_macos()
• [x] rhub::check_on_linux() (might be a catch all for all flavours - check docs)
• [x] R CMD check --as-cran (use Build Source Package to create rsofun_x.x.tar.gz file)
• [ ] git push remaining changes

Submit to CRAN:

• [ ] devtools::submit_cran()
• [ ] Approve email
• [ ] Accepted email
• [ ] Update release