Lua: either update to 5.4 or add a separate lua54 port (or both?)

[cooljeanius (Eric Gallager)]

$ port -v livecheck lua
lua seems to have been updated (port version: 5.3.5, new version: 5.4.4)
$ port search lua54
No match for lua54 found

The current version of Battle for Wesnoth (1.16) uses Lua 5.4: ​https://wiki.wesnoth.org/LuaAPI ...and I would like to be able to use certain lua-related tools from MacPorts to work with lua-related code from it (e.g. luacheck), except with the most recent version of Lua.