Changes ERC777 external functions to public for allowing overrides #1994 (#2001)
Changes ERC777 external functions to public for allowing overrides #1994 (#2001)

* Changes ERC777 external functions to public for allowing overrides #1994

* Changes ERC777 external functions to public for allowing overrides (#1994)

OpenZeppelin/zeppelin-solidity,OpenZeppelin/zep-solidity,OpenZeppelin/zeppelin-solidity,OpenZeppelin/openzeppelin-contracts,OpenZeppelin/openzeppelin-contracts,OpenZeppelin/zep-solidity,OpenZeppelin/openzeppelin-contracts