Patch that fixes issues with newer langchain versions when pip installing

What's Changed

• Readme update by @ATheorell in https://github.com/gpt-engineer-org/gpt-engineer/pull/916
• build(deps): moved dev dependencies to dev group by @ErikBjare in https://github.com/gpt-engineer-org/gpt-engineer/pull/920
• fix: workaround for refactor on new versions of langchain by @ErikBjare in https://github.com/gpt-engineer-org/gpt-engineer/pull/924

Full Changelog: https://github.com/gpt-engineer-org/gpt-engineer/compare/v.0.2.4...v.0.2.5