2023-02-28 - Breathe v4.35.0

Note: This release was not PGP signed on PyPI due to key availability issue. See #901 for details.

• Pull lone literal blocks in paragraphs up to produce correct doctree.
  #833
• Fix tests for changes in Sphinx 5.3. #865
• Bump Python requirement to 3.7. #866
• Support Sphinx 6. #885
• Support :sort: option to sort sections by name. #879