Ethereum-etl

Fix https://github.com/blockchain-etl/ethereum-etl/issues/264

- Add EIP-1559 fields
- `base_fee_per_gas` in blocks
- `max_fee_per_gas`, `max_priority_fee_per_gas`, `transaction_type` in transactions
- `effective_gas_price` in receipts
- Add `--values-as-strings` option to the `extract_tokens` and `extract_token_transfers` commands
- Fix receipt_effective_gas_price in the `stream` command

- Add EIP-1559 fields
- Add `--values-as-strings` option to extract_tokens and extract_token_transfers command

Fix typo that prevented exporting traces to Postgres output

Add NAME, SYMBOL, DECIMALS to `erc20_abi.py` and `eth_token_service.py` to support non-standard ERC20 methods

Add missing `__init__.py` file in the `converters` package.