v8.1.8: New faster mapping layer and bug fixes for resizeable layer

✨ New features and improvements

• Add premap_ids.v1 layer for mapping from ints to ints (#815).
• Update to mypy 1.0.x (#848).

🔴 Bug fixes

• Make resizable layer work with textcat and transformers (#820).

📖 Documentation

• Update website including Dockerfile (#843, #844, #845).

👥 Contributors

@adrianeboyd, @danieldk, @essenmitsosse, @honnibal, @ines, @kadarakos, @patjouk, @polm, @svlandeg