CI: upgrading running instances of various OS/compilers
CI: upgrading running instances of various OS/compilers

gcc -> 5/9/latest for regular build+tests, 9 for test coverage build
(currently 9 is 9.5 at EOL, latest is 12, 5 is legacy assurance)

freeBSD -> 14.0 snapshot (13.0 has now stable release)

macos -> switching from (x86?) big-sur to M1 monterey

z00m128/sjasmplus,z00m128/sjasmplus,z00m128/sjasmplus