Update components

• Update reveal.js from 4.1 to 4.4
• Update Pandoc from 2.9 to 2.19

added To Do label

changed the description

added Doing label and removed To Do label

assigned to @jurgenhaas

mentioned in commit cdbd3d3c

marked the checklist item Update reveal.js from 4.1 to 4.4 as completed

marked the checklist item Update Pandoc from 2.9 to 2.19 as completed

closed

removed Doing label