Bump maturin from 1.5.1 to 1.6.0 in the dependencies group (#59)

Bumps the dependencies group with 1 update: [maturin](https://github.com/pyo3/maturin).


Updates `maturin` from 1.5.1 to 1.6.0
- [Release notes](https://github.com/pyo3/maturin/releases)
- [Changelog](https://github.com/PyO3/maturin/blob/main/Changelog.md)
- [Commits](PyO3/maturin@v1.5.1...v1.6.0)

---
updated-dependencies:
- dependency-name: maturin
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements_dev.txt

@@ -1,5 +1,5 @@
 citiespy==0.5.5
-maturin==1.5.1
+maturin==1.6.0
 pytest
 pytest-benchmark
 pytest-cov