Fixes

• Updated SputnikVM dependency with bugfix in the returndatacopy implementation and a performance improvement in accessing EVM memory by @birchmd. #826

Changes

• BREAKING: engine-standalone-storage no longer automatically writes to the DB when consume_message is called. It is up to downstream users of the library to commit the diff (after doing any validation for correctness) by @birchmd. #825

Additions

• New crate for the so-called "hashchain" implementation. It will enable verification of Aurora blocks by light clients in the future by @birchmd. #816