Make ERC1155.uri public (#2576)

(cherry picked from commit 5dbbda54)

CHANGELOG.md

@@ -19,6 +19,7 @@
  * `ERC777`: Optimize the gas costs of the constructor. ([#2551](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2551))
  * `ERC721URIStorage`: Add a new extension that implements the `_setTokenURI` behavior as it was available in 3.4.0. ([#2555](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2555))
  * `AccessControl`: Added ERC165 interface detection. ([#2562](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2562))
+ * `ERC1155`: Make `uri` public so overloading function can call it using super. ([#2576](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2576))
 
 ### Bug fixes for beta releases
 

contracts/token/ERC1155/ERC1155.sol

@@ -55,7 +55,7 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
      * Clients calling this function must replace the `\{id\}` substring with the
      * actual token type ID.
      */
-    function uri(uint256) external view virtual override returns (string memory) {
+    function uri(uint256) public view virtual override returns (string memory) {
         return _uri;
     }