math/py-matplotlib-scalebar: Update to 0.9.0

• Update tooling
• Add example gallery
• Add bbox_anchor and bbox_transform
• Add common astronomical lengths
• Fix example_angular.py
• Support Python 3.12
• Add a (skippable) check that the axes have equal aspect ratio
• Use \\mathregular for LaTeX micro

Changelog: https://github.com/ppinard/matplotlib-scalebar/compare/0.8.1...0.9.0

Reported by: Repology