fix ethpm.json
fix ethpm.json

OpenZeppelin/zeppelin-solidity,OpenZeppelin/zeppelin-solidity,OpenZeppelin/openzeppelin-contracts,dmx374/zeppelin-solidity,OpenZeppelin/zep-solidity,maraoz/zeppelin-solidity,OpenZeppelin/openzeppelin-contracts,OpenZeppelin/openzeppelin-contracts,dmx374/zeppelin-solidity,OpenZeppelin/zep-solidity,pash7ka/zeppelin-solidity,maraoz/zeppelin-solidity,pash7ka/zeppelin-solidity