Add GitHub workflow and luacheck (#545)

David Leal

2020-06-12 a8daa417c485ee20716ec050d4c676b5c91af773

 technic_cnc/cnc.lua

@@ -72,7 +72,6 @@
   end
end

local shape = {}
local onesize_products = {
   slope                    = 2,
   slope_edge               = 1,