Test fixes for CPython 3.10.0b3
Support for sys.unraisablehook() on Python >= 3.8
Fix two minor memory leaks (thanks Sebastian!)
Like many projects that had an IRC channel on freenode, we moved it to irc.libera.chat.
Signed-off-by: Zang Ruochen <zangrc.fnst@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>