Automatically merged updates to draft EIP(s) 1155 (ethereum#2118)

Hi, I'm a bot! This change was automatically merged because:

 - It only modifies existing Draft or Last Call EIP(s)
 - The PR was approved or written by at least one author of each modified EIP
 - The build is passing

EIPS/eip-1155.md

@@ -705,6 +705,7 @@ Another simple way to represent non-fungibles is to allow a maximum value of 1 f
 - [Here Be Dragons - Going Beyond ERC-20 and ERC-721 To Reduce Gas Cost by ~80%](https://medium.com/horizongames/going-beyond-erc20-and-erc721-9acebd4ff6ef)
 - [Blockonomi - Ethereum ERC-1155 Token Perfect for Online Games, Possibly More](https://blockonomi.com/erc1155-gaming-token/)
 - [Beyond Gaming - Exploring the Utility of ERC-1155 Token Standard!](https://blockgeeks.com/erc-1155-token/)
+- [ERC-1155: A new standard for The Sandbox](https://medium.com/sandbox-game/erc-1155-a-new-standard-for-the-sandbox-c95ee1e45072)
 
 ## Copyright
 Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).