Wandering Trader should trade obsidian

The wandering trader already trades various random items and having the wandering trader trade obsidian wouldn't be a stretch. The reason this would be so helpful is if you wanted to go to the nether in a flat world. Right now there is no way to get to the nether in a flat world on bedrock edition. If wandering traders traded obsidian with the player a whole new dimension with tons of resources would be open to the flat world players. This would expand their block pallet and let them truly take advantage of the flat landscape to build so much more. There are no down sides with this change and it would mean a whole lot to us flat world players. Please consider adding an obsidian trade to wandering traders.