Fix update script

Author: vaisest

src/UpdateApply.lua

@@ -6,7 +6,7 @@
 --
 
 ---@param opFileName string
-return function(opFileName)
+local function applyUpdate(opFileName)
 	print("Applying update...")
 	local opFile = io.open(opFileName, "r")
 	if not opFile then
@@ -47,3 +47,14 @@ return function(opFileName)
 		end
 	end
 end
+
+-- this file is used both as a module and as a script depending on the update
+-- mode. basic mode will spawn a process, while normal mode will use this as a
+-- module.
+
+local opFileName = ...
+if opFileName then
+	return applyUpdate(opFileName)
+end
+
+return applyUpdate