Update rlp requirement from ~=0.6.0 to ~=4.0.0 in /server

[dependabot[bot]]

Updates the requirements on rlp to permit the latest version.

Changelog

Sourced from rlp's changelog.

pyrlp v4.0.0 (2023-11-29)

Features

- ``repr()`` now returns an evaluatable string, like ``MyRLPObj(my_int_field=1, my_str_field="a_str")`` (`[#117](https://github.com/ethereum/pyrlp/issues/117) <https://github.com/ethereum/pyrlp/issues/117>`__)
Internal Changes - for pyrlp Contributors

• Convert .format strings to f-strings ([#144](https://github.com/ethereum/pyrlp/issues/144) <https://github.com/ethereum/pyrlp/issues/144>__)
• Add autoflake linting and move config to pyproject.toml ([#145](https://github.com/ethereum/pyrlp/issues/145) <https://github.com/ethereum/pyrlp/issues/145>__)

Release Notes

.. _v0.4.8-release-notes:

0.4.8

• Implement Serializable.make_mutable and rlp.sedes.make_mutable API.
• Add mutable flag to Serializable.deserialize to allow deserialization into mutable objects.

Commits

• 7c62b07 Compile release notes
• 6c1436c add autoflake and move configs to pyproject.toml
• 8a6d337 convert .format to f-strings (#144)
• 59590b1 Merge pull request #142 from pacrob/join-template-and-drop-py36
• 2307df4 fill template variables and lint, drop py36 and py37, add py311
• d32538e merge template
• 0065691 Update Makefile
• 2ed5fba Update pull_request_template.md
• 7099bba Add pre commit (#103)
• efcb97c Update .gitignore
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot show ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot[bot]]

Superseded by #310.