chore: release v0.13.1

[github-actions]

🤖 New release

• genoxide: 0.13.0 -> 0.13.1 (✓ API compatible changes)
• genoxide-python: 0.13.0 -> 0.13.1

Changelog

genoxide

0.13.1 - 2026-10-02

Added

• shift and rotation wrappers and seventeen CEC- and BBOB-style functions, each with its own example (#409)
• (moead) MOEA/D-DE, differential evolution in place of the crossover (Li and Zhang 2009) (#418)
• the constrained DTLZ8 and DTLZ9, the DC-DTLZ and the DAS-CMOP problems, each with its own example (#414)
• (problems) gradients for batch 10b's functions, and gradients and constraint values through Shifted and Rotated (#420)
• (problems) binary and combinatorial problems, batch 12, each with its own example (#421)

Documentation

• (ctp) CTP1-CTP8 checked against the published paper and Deb's 2001 book (#419)

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