Log Message:
(cad/py-gdstk) Updated 0.9.40 to 0.9.41

## 0.9.41 - 2023-05-24
### Added
- Dictionary-like access to library cells by name.
- `len(Library)` returns the number of cells in the library
- `Reference.cell_name` to directly access a referenced cell's name
### Fixed
- `RobustPath` accepts width of 0 at the path end