fix: upgrade keccak from 3.0.2 to 3.0.4

Snyk has created this PR to upgrade keccak from 3.0.2 to 3.0.4.

See this package in npm:
https://www.npmjs.com/package/keccak

See this project in Snyk:
https://app.snyk.io/org/sammyfilly/project/ad19f019-3c8a-4b00-84c5-fdbffb9fb897?utm_source=github&utm_medium=referral&page=upgrade-pr