Bump @ethereumjs/tx from 4.2.0 to 5.0.0

Bumps [@ethereumjs/tx](https://github.com/ethereumjs/ethereumjs-monorepo) from 4.2.0 to 5.0.0.
- [Release notes](https://github.com/ethereumjs/ethereumjs-monorepo/releases)
- [Commits](https://github.com/ethereumjs/ethereumjs-monorepo/compare/@ethereumjs/tx@4.2.0...@ethereumjs/tx@5.0.0)

---
updated-dependencies:
- dependency-name: "@ethereumjs/tx"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]