Add protonplus

#259

Author: Kron4ek

settings.sh

@@ -47,7 +47,7 @@ PACKAGES=(
 	libretro-blastem libretro-bsnes libretro-dolphin duckstation-gpl
 	libretro-gambatte libretro-melonds libretro-mgba libretro-nestopia
 	libretro-parallel-n64 libretro-picodrive libretro-ppsspp
-	libretro-yabause pcsx2-git lsfg-vk-git
+	libretro-yabause pcsx2-git lsfg-vk-git protonplus
 	# extra
 	nano ttf-dejavu ttf-liberation firefox mpv geany pcmanfm
 	htop qbittorrent speedcrunch gpicview file-roller openbox lxterminal