Bump derive_builder from 0.5.1 to 0.7.1

Bumps [derive_builder](https://github.com/colin-kiegel/rust-derive-builder) from 0.5.1 to 0.7.1.
- [Release notes](https://github.com/colin-kiegel/rust-derive-builder/releases)
- [Commits](https://github.com/colin-kiegel/rust-derive-builder/compare/v0.5.1...v0.7.1

)

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