Adopt new Solidity features interfaceId, try/catch, keccak constants (#2487)

* Clean code

-  using type().interfaceId to improve readeability of ERC165 registration
- hardcoding some keccak256 that are otherwise computed at construction.

* hardcode keccak256 result

* Improve code readeability using try/catch

* Remove hardcoded hash 

tests show that solc 0.8.0 does the optimization as expected

* Use try/catch to improve readability

* ERC165Checker: Do not revert when returndata is empty + new test

* Address PR comments

* improve testing of ERC721Receiver errors

* put back comment about invalid interface id

* coverage does not support 0.8.1. Reverting back to 0.8.0

* bubble all data with length > 0 if onERC721Receive fails.

* Fix test: revert without message trigger is bubble with the default message

* using enum object to improve readability

contracts/introspection/ERC165.sol

@@ -11,11 +11,6 @@ import "./IERC165.sol";
  * their support of an interface.
  */
 abstract contract ERC165 is IERC165 {
-    /*
-     * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
-     */
-    bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
-
     /**
      * @dev Mapping of interface ids to whether or not it's supported.
      */
@@ -24,7 +19,7 @@ abstract contract ERC165 is IERC165 {
     constructor () {
         // Derived contracts need only register support for their own interfaces,
         // we register support for ERC165 itself here
-        _registerInterface(_INTERFACE_ID_ERC165);
+        _registerInterface(type(IERC165).interfaceId);
     }
 
     /**