Make on_lightning_strike available to non-mob entities

mods/ENVIRONMENT/lightning/init.lua

@@ -135,7 +135,7 @@ function lightning.strike_func(pos, pos2, objects)
 	-- damage nearby objects, transform mobs
 	for _, obj in pairs(objects) do
 		local lua = obj:get_luaentity()
-		if lua and lua.is_mob then
+		if lua then
 			if not lua.on_lightning_strike or ( lua.on_lightning_strike and lua.on_lightning_strike(lua, pos, pos2, objects) ) ~= true then
 				mcl_util.deal_damage(obj, 5, { type = "lightning_bolt" })
 			end