Update ERC721Pausable and ERC721Burnable

contracts/token/ERC721/ERC721Burnable.sol

@@ -8,6 +8,8 @@ import "./ERC721.sol";
  * @dev ERC721 Token that can be irreversibly burned (destroyed).
  */
 contract ERC721Burnable is Context, ERC721 {
+    constructor (string memory name, string memory symbol) public ERC721(name, symbol) { }
+
     /**
      * @dev Burns a specific ERC721 token.
      * @param tokenId uint256 id of the ERC721 token to be burned.

contracts/token/ERC721/ERC721Pausable.sol

@@ -8,6 +8,8 @@ import "../../utils/Pausable.sol";
  * @dev ERC721 modified with pausable transfers.
  */
 contract ERC721Pausable is ERC721, Pausable {
+    constructor (string memory name, string memory symbol) public ERC721(name, symbol) { }
+
     function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override {
         super._beforeTokenTransfer(from, to, tokenId);