Update Nuked OPL3 emulator to lastest version

[eugene-s-nesdev]

Can you update Nuked-OPL3 core to lastest-master please?
There are some bugfixes and new features since 2019: including stereo-extension, 4-ch output support and accuracy fixes like this:
nukeykt/Nuked-OPL3@f2c9873

Actual core version is 1.8. NukeYKT current repo:
https://github.com/nukeykt/Nuked-OPL3/blob/master/opl3.c
https://github.com/nukeykt/Nuked-OPL3/blob/master/opl3.h

Looks like PCem version a bit outdated:
https://github.com/sarah-walker-pcem/pcem/blob/dev/src/dosbox/nukedopl.cpp