Support new Feral File

[0xmichalis]

Should be possible by tracking RegistrationUpdated or SubscriptionUpdated events in https://etherscan.io/address/0x000000000000aaeb6d7670e522a718067333cd4e then use dynamic contracts.

Example registration tx: https://etherscan.io/tx/0x537f9df74d245525837e5213d6d7b7b4bd72d9074dbc14d11ace36e9f35266e7#eventlog