=============
- Update Python-related tooling (black, mypy with type-hinting comments, pytest,
tox, coverage).
- Reorganize source tree to use ``src/`` subdirectory.
- Restructure code to reduce cyclomatic complexity.
- Support Python 3.8.
- Add "readme" command to display the top-level README.rst.
- Update the list of known switches (now supporting through Subversion 1.13).