v0.59.3

Fixed

• A table-of-contents entry no longer becomes a section heading. A line with a dot leader and a page number
  ("2.5.1 Harmony Chat Format . . . . 6", "HOST Interface ........ 11") is a contents entry, whether it stands on its own
  line or the reader marked it as a heading. Before, each such entry became a second, empty section in front of the real
  one. The newer PDF extractor puts every contents entry on its own line, so a PDF with a contents page got one false
  section per entry.

Dependencies

• Parser libraries moved to their current releases: Unpdf 0.35.0 -> 0.41.0, Undoc 0.19.0 -> 0.23.0, Unhwp 0.15.0 -> 0.19.0.
• Re-pinned sibling packages LMSupply.Captioner, LMSupply.Core, LMSupply.Embedder, LMSupply.Generator, LMSupply.Ocr and LMSupply.Transcriber 0.118.0 -> 0.120.0.