Will this mod see an update to version 1.1 of factorio?

I have this working for 1.1 already. If the author doesn't update it, I'll release a fix for it as i need it for one of my mods

Yes, I am on it.

OK, it's uploaded, Feedback appreciated.

Works fine without any issues.

Great to hear 👍

I have updated the mod again, with the changes from KroshkaRoo, it separates the research for steel and electric double furnaces. Testing very appreciated :)

You have an error coming up when trying to play some of the mini-tutorials.

Error while applying migration: Double Furnace: DoubleFurnace_0.1.1.lua

DoubleFurnace/migrations/DoubleFurnace_0.1.1.lua:9: attempt to index field 'double-smelting-tech' (a nil value)
stack traceback:
DoubleFurnace/migrations/DoubleFurnace_0.1.1.lua:9: in main chunk

Could you test 0.5.1?