v0.12.1

Changed

• Metadata-only release. PyPI now carries the rewritten project
  description, the roteskills.com homepage and changelog URLs, the
  richer keyword set, Development Status :: 4 - Beta, the
  Environment :: Console, AI-topic and Typing :: Typed
  classifiers, an author email, and the py.typed marker added in
  0.12.0's README and discovery work (#72, #74). No code changes.