v2.1.20

New Features

• nbio: add find_id, FoundCells context-aware find_cells, update_cell and deep_merge; expand ~ in nb paths; id prefix lookup (#891)
• Extend render_md with ansi='html' to render ANSI colors as an {=html} block (#880), thanks to @RensDimmendaal
• Add WebP and GIF image support (#877), thanks to @RensDimmendaal