release-0.17.4

• CMake adoption resolves simple set(...) and list(APPEND ...) source lists
  for the selected target, respects inactive default option branches, reads
  CMAKE_CXX_STANDARD, and can derive versions from exact
  <PROJECT>_VER_MAJOR, _MINOR, and _PATCH macros. This correctly adopts
  projects such as spdlog without pulling in their tests and benchmarks.
• Dependency suggestions for compiled CMake libraries now follow headers
  reached by their selected sources, avoiding optional public-header adapters
  that are not part of the library's default build.