Sinlib

**Full Changelog**: https://github.com/Ransaka/sinlib/compare/0.1.9...0.1.9.1

**Full Changelog**: https://github.com/Ransaka/sinlib/compare/0.1.8...0.1.9

Update the version in `__init__.py` and `pyproject.toml` to 0.1.8. Remove unused data files (`config.json`, `sinhala_chars_with_special_chars.txt`, `char_map.json`, `vocab.json`) and update the logo reference in `README.md`. Add return statement in `tokenizer.py` to prevent unintended execution.

**Full Changelog**: https://github.com/Ransaka/sinlib/compare/0.1.6...0.1.7

**Full Changelog**: https://github.com/Ransaka/sinlib/compare/0.1.5...0.1.6

**Full Changelog**: https://github.com/Ransaka/sinlib/compare/0.1.4...0.1.5