codemap 0.0.19 — three packages by other people, three defects our own trees could not show

Schema 0.13, unchanged for the eighth release running. Everything here came from one
afternoon of axis B4: pointing codemap at pytest, attrs and Pillow — code written by
neither its author nor its consumers — with the expectations committed before the run.

- R1-C55 an override is reached through its base, so it cannot be graded confidently dead
  (40 of 63 `high` candidates on Pillow were wrong).
- R1-C56 a `.pyi` is never executed, so it cannot close an import cycle (Pillow's only
  hard cycle was fabricated by one).
- R1-C57 the facade layout crashed the build, reported a public surface of one symbol for
  a package that re-exports 90, and was the one report the empty-import-graph warning did
  not reach.

Verified from PyPI with both published versions on one tree carrying all three shapes.
Suite 938 -> 961.