Replace deprecated methods:

- 'setting_get' with 'settings:get'
- 'setting_getbool' with 'settings:get_bool'

init.lua

@@ -335,7 +335,7 @@ if minetest.get_modpath('spawneggs') and minetest.get_modpath('tnt') then
 				local pos = pointed_thing.above
 				pos.y = pos.y+1
 				minetest.add_entity(pos,"creeper:creeper")
-				if not minetest.setting_getbool("creative_mode") then
+				if not minetest.settings:get_bool("creative_mode") then
 					itemstack:take_item()
 				end
 				return itemstack

tnt_function.lua

@@ -1,6 +1,6 @@
 -- From TNT
 local cid_data = {}
-local radius = tonumber(minetest.setting_get("tnt_radius") or 3)
+local radius = tonumber(minetest.settings:get("tnt_radius") or 3)
 local large_radius = 5
 local loss_prob = {
 	["default:cobble"] = 3,