Fix a regression that leads to crashes when an error is detected.
2.1.0
- Explicitly support Python 3.9. - Complete type annotations. - Expose `flake8_executable.__version__` when used as a library. - More robust Windows code testing. - Internal code cleanup.
2.0.4
Explicitly support Python 3.8.
2.0.3
- Fix crash when input is from stdin and is empty. - Recognize stdin as a filename that indicates the input is from stdin.