This version requires `vt` package version `1.6.3` or higher. - **Build System**: Migrated to PEP 517-compliant build system with `pyproject.toml` - **Documentation**: Added `RELEASES.md` with detailed release process guidelines - **API Consistency**: Renamed `contactsurface()` method to `contact_surface()` for clarity and consistency - **Feature Addition**: Extended default property list to include `'principal-value'` and `'principal-vector'` - **Bug Fix**: Replaced `None` returns with empty lists/arrays for invalid results to ensure better consistency and avoid iteration issues - **Testing**: Added tests for `ImagePointer` class to validate array copying and label uniqueness