fix: upgrade @ethereumjs/util from 8.0.5 to 8.1.0

Snyk has created this PR to upgrade @ethereumjs/util from 8.0.5 to 8.1.0.

See this package in npm:
https://www.npmjs.com/package/@ethereumjs/util

See this project in Snyk:
https://app.snyk.io/org/sammytezzy/project/7f124e9f-9e7a-4ecd-92b5-9c3fc12e6308?utm_source=github&utm_medium=referral&page=upgrade-pr