Bump to v0.9.1

Benchmarks v0.9.0 (PyVRP#625)

Release v0.8.2

Fix CD, also run on push to main (PyVRP#544)

* Run CD also on push to main

* Fix a small concurrency issue in workflow execution

* Fix CD on Windows by bumping to CIBW v2.16.5

See pypa/cibuildwheel#1740 for details

* Work around macOS's problem with std::optional::value, use macos-14

* Fix uploading and downloading artifacts

See actions/upload-artifact#478 (comment) for details

* Bump to v0.8.1

Bump version

Add benchmark results to docs (PyVRP#438)

* Add note, yank old PCVRPTW results

* Update benchmark

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Co-authored-by: Leon Lan <l.lan@vu.nl>

Bump version

Add extract_docstrings script to sdist (PyVRP#377)

* Add extract_docstrings script to sdist

* Bump version

Fix bug (PyVRP#369)

* Add test case and fix bug in TwoOpt

* Bump version

Bump version