Removed
- Removed the `devproject` folder.
Added
- Added instructions for creating an equivalent to the deleted `devproject` folder.
Changed
- Move main code within an `src/` directory
- Move `tox` config into `pyproject.toml`, instead of `tox.ini`
- Move much of old `setup.py` into `pyproject.toml`
- Add Python 3.13 to tests (no code changes required)
- Allow for use of Pillow v11