This is a **bug report**
## Problem
The message hash package (https://github.com/waku-org/js-waku/blob/master/packages/message-hash/src/index.ts) does not match the spec https://github.com/vacp2p/rfc-index/blob/main/waku/standards/core/14/message.md#deterministic-message-hashing - the `timestamp` is not included in the hash
## Proposed Solutions
include `timestamp`
## Notes