lua 5.4 support

Hi, thanks for sharing these lua bindings. I would like to use lua-pulseaudio instead of relying on a system call to pactl for a small project of mine. Do you know how tough it would be to support lua 5.4? I am assuming that is the cause of the issue I am seeing when trying to run your example:

lua: error loading module 'pulseaudio' from file '/usr/lib/lua/5.4/pulseaudio.so':
	/usr/lib/lua/5.4/pulseaudio.so: undefined symbol: pa_context_set_sink_mute_by_index

Thanks for your time.