Log Message:
py-diff-match-patch: updated to 20230430

v20230430

Maintenance release

- Replaced deprecated `imp` usage with `importlib`
- Migrated to PEP 621 metadata, flit
- Reformated with updated black/µsort/µfmt
- Tested on Python 3.7 - 3.11
- Dropped support for Python 2.7, 3.5, and 3.6