replace deprecatedexplotion with tnt.boom

* use tnt.boom for explotion with specific definition
* added depends on tnt due the change!

depends.txt

@@ -1,2 +1,3 @@
 nssm
 default
+tnt

mapgen.lua

@@ -870,7 +870,7 @@ minetest.register_abm({
 	function(pos, node)
 		for _,obj in ipairs(minetest.get_objects_inside_radius(pos, 7)) do
 			if obj:is_player() then
-				nodeupdate(pos)
+				minetest.check_for_falling(pos)
 			end
 		end
 	end
@@ -886,7 +886,7 @@ minetest.register_abm({
 	function(pos, node)
 		for _,obj in ipairs(minetest.get_objects_inside_radius(pos, 5)) do
 			if obj:is_player() then
-				explosion(pos, 3, 0, 1)
+				tnt.boom(pos,{radious = 3,dmage_radious = 0})
 			end
 		end
 	end