0.18.1

Release notes: https://www.rustworkx.org/release_notes.html#relnotes-0-18-1

What's Changed

• Add license metadata to pyproject.toml (backport #1623) by mergify[bot] in #1624
• Setup separate rustworkx-core publish job with trusted publishers (backport #1630) by mergify[bot] in #1632
• Handle self-loops in all_simple_paths (backport #1619) by mergify[bot] in #1631
• Fix undirected_gnm_random_graph so it does not return a multigraph (backport #1641) by mergify[bot] in #1642
• Fix longest_path_length for initial hole (backport #1651) by mergify[bot] in #1652
• Avoid having to manually bump documentation versions (backport #1655) by mergify[bot] in #1656
• Publish PowerPC free-threaded wheels (backport #1643) by mergify[bot] in #1658
• Publish experimental wheels for Pyodide (backport #1620) by mergify[bot] in #1659
• Prepare 0.18.1 release by Matthew Treinish (@mtreinish) in #1653

Full Changelog: 0.18.0...0.18.1