holoviz/panel: Version 0.12.1

This is a patch release with a small number of fixes following the 0.12.0 release. Many thanks to the maintainers @MarcSkovMadsen and @philippjfr for the fixes in this release. Enhancements: Bundle .map files during build to allow source mapping (#2591) Various style improvements for Fast templates (#2604, #2609, #2611, #2615) Implement hierarchical aggregation for Tabulator (#2624) Bug fixes: Fix logo on Fast templates (#2184) Fix height responsiveness of Folium pane (#2231) Fix bug updating Tqdm indicator (#2554) Ensure --autoreload doesn't error on cleaned up session (#2570) Don't use persisted layout if save_layout=False (#2579) Pin version of tqdm with asyncio support (#2595) Reset layout when resetting grid template layout (#2576) Fix line-height issues in Fast templates (#2600) Clean up sessions after warmup and ensure periodic callbacks are cleaned up (#2601) Documentation: Enable JupyterLab preview button on binder (#2545) Update theme toggle documentation for Fast templates (#2560) Update Fast template documentation and enable full screen (#2577) Fix binder links on website (#2590) Add docs about loading the ipywidgets extension (#2594