Changes for version 0.10 - 2023-03-28

    • Remember to destroy the `catches` HV after immediate `->thencatch` (RT145699)
    • Many other small refcount-related bugfixes
    • Provide MAGIC with an `svt_dup` function on threaded perls, so as not to break objects on destruction of sidecar threads
    • Don't SEGV when DESTROY is run during global destruction and some SVs have already been reclaimed


experimental XS implementation of Future