Decrease CREATE2 address computation gas usage from 623 to 539 (#2244)

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

contracts/utils/Create2.sol

@@ -54,6 +54,6 @@ library Create2 {
         bytes32 _data = keccak256(
             abi.encodePacked(bytes1(0xff), deployer, salt, bytecodeHash)
         );
-        return address(bytes20(_data << 96));
+        return address(uint256(_data));
     }
 }