Bump xdoctest from 0.15.10 to 1.0.0 (#172)

Bumps [xdoctest](https://github.com/Erotemic/xdoctest) from 0.15.10 to 1.0.0.
- [Release notes](https://github.com/Erotemic/xdoctest/releases)
- [Changelog](https://github.com/Erotemic/xdoctest/blob/main/CHANGELOG.md)
- [Commits](Erotemic/xdoctest@v0.15.10...v1.0.0)

---
updated-dependencies:
- dependency-name: xdoctest
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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