I would like to be able to reset the internal KeccakState of a Keccak instance so that its buffer and offset are zeroed out. I can see that there is a method reset on KeccakState, which however is only ever called from KangarooTwelve.

It is possible to provide a reset method on Keccak calling KeccakState:reset? Is there maybe a reason why there is no such method? I can otherwise provide a PR, but I wanted to ask first.