Type UNSIGNED24 not suported and crashes #622

Hello,

I see that this library does not contemplate the type unsigned24, and others.
I've checked it here: https://www.port.de/cgi-bin/CAN/CanOpenDataTypes

It implies many things. For example, if you send a pdo, you cant create it if you have a unsigned24. You have to construct the bytearray,

Also, when accessing it from other node, of course, the library does not know how to manage this typing, and what seems more crazy to me, is that just accesing to the variable of the object: obj.raw, returns -> ERROR | unhashable type: 'bytearray'

And this error happens for just accessing to it.