0.2.1
-----
# API
- Add `Automaton::grid_size()` and `Automaton::grid_size_unchecked()`

0.2.0
-----
# API
- Split the automaton builder into multiple structs

# Frontend
- Use `fold(write!())` instead of `map().collect()` in `render_grid_str()`

# Code style
- Add clippy
- Apply clippy suggestions
