Update copyright year from plugins/*.lua files

Author: gilzoide

Makefile

@@ -244,7 +244,7 @@ endif
 
 update-copyright-year:
 	sed -i -E -e 's/(Copyright [^0-9]*)([0-9]+)(-[0-9]+)?/\1\2-$(shell date +%Y)/' \
-		$(wildcard src/*.c src/*.lua)
+		$(wildcard src/*.c src/*.lua plugin/*.lua)
 
 
 # Miscelaneous targets

plugin/export_plugin.lua

@@ -1,7 +1,7 @@
 -- @file plugin/export_plugin.lua  EditorExportPlugin for minifying Lua scripts on release exports
 -- This file is part of Godot Lua PluginScript: https://github.com/gilzoide/godot-lua-pluginscript
 --
--- Copyright (C) 2021 Gil Barbosa Reis.
+-- Copyright (C) 2021-2023 Gil Barbosa Reis.
 -- 
 -- Permission is hereby granted, free of charge, to any person obtaining a copy
 -- of this software and associated documentation files (the “Software”), to

plugin/lua_repl.lua

@@ -1,7 +1,7 @@
 -- @file plugin/lua_repl.lua  A tool Node for building a Lua REPL in-editor
 -- This file is part of Godot Lua PluginScript: https://github.com/gilzoide/godot-lua-pluginscript
 --
--- Copyright (C) 2021 Gil Barbosa Reis.
+-- Copyright (C) 2021-2023 Gil Barbosa Reis.
 -- 
 -- Permission is hereby granted, free of charge, to any person obtaining a copy
 -- of this software and associated documentation files (the “Software”), to