build(deps): bump eth-account in /tests/integration_tests (#1317)

Bumps [eth-account](https://github.com/ethereum/eth-account) from 0.5.7 to 0.5.9.
- [Release notes](https://github.com/ethereum/eth-account/releases)
- [Changelog](https://github.com/ethereum/eth-account/blob/master/docs/release_notes.rst)
- [Commits](ethereum/eth-account@v0.5.7...v0.5.9)

---
updated-dependencies:
- dependency-name: eth-account
  dependency-type: indirect
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Freddy Caceres <facs95@gmail.com>