Type 1 transactions and access lists

[mikeshultz]

Add support for EIP-2930 access lists and type 1 transactions.

It's been partially implemented in PR #10 but I need to learn more about it and get encoding working for more than blank access lists.

[mikeshultz]

@unparalleled-js provided this as a reference: https://github.com/ethereum/eth-account/blob/master/eth_account/_utils/typed_transactions.py#L80-L87