Release 1.17.5

• Drop Python2 support (using pyupgrade --py3-plus *.py)
• Make it possible to use keys with Unicode keysyms in keybindings (requires ibus > 1.5.30) (Resolves: mike-fabian/ibus-typing-booster#497, same problem for ibus-table)
• Use frames_per_buffer=chunk_size option in self._paudio.open() (Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2238746#c3)
• Translation update from Weblate (cs 36.6%, ja 45.3%, zh_CN 92.0%)