Bump setuptools from 50.3.2 to 51.0.0 in /server (#23)

Bumps [setuptools](https://github.com/pypa/setuptools) from 50.3.2 to 51.0.0.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/master/CHANGES.rst)
- [Commits](pypa/setuptools@v50.3.2...v51.0.0)

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