* added tests for getApproved * added tests for getApproved * added to changelog * Corrected some linting issues * Removed unneccrary tests as pointed out here: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/1820/commits/b49c2de086621745955be83a34a06de65e95c76c#r307927816 * Correct Changelog character * Update ERC721.behavior.js
