String concatenation with nil

[DaleStan]

When attempting to load Kux-BlueprintExtensions in Yafc, the following error happens

(Kux-CoreLib, lib/ModInfo.lua):136: attempt to concatenate field 'version' (a nil value)
stack traceback:
[C]: in function '__concat'
(Kux-CoreLib, lib/ModInfo.lua):136: in function 'update'
(Kux-CoreLib, lib/ModInfo.lua):145: in main chunk
[C]: in function 'require'
(Kux-CoreLib, lib/init.lua):179: in function '__index'
(Kux-BlueprintExtensions, mod.lua):4: in main chunk
[C]: in function 'require'
(Kux-BlueprintExtensions, data.lua):1: in main chunk

As far as I can tell, the ability to concatenate with nil is something the Factorio devs invented; it doesn't appear to be supported by official versions of Lua. I have also been unable to figure out how to convince Yafc's version of Lua to support that feature. Can I talk you into updating Kux-CoreLib and/or Kux-BlueprintExtensions so that it no longer attempts a nil concatenation, please?

[DaleStan]

It turns out this was our fault after all (shpaass/yafc-ce#353). My apologies for the incorrect report.