v2.22.0

Added

• Add legend references to traces and legend2, legend3, etc. to layout,
  also add visible to legend i.e. to allow positioning multiple legends on a graph [#6535],
  this feature was anonymously sponsored: thank you to our sponsor!

Changed

• Update Norwegian translations in no locale [#5410],
  with thanks to @bjornol for the contribution!
• Update Slovak translations and number formats in sk locale [#6580], with thanks to @Libco for the contribution!

Fixed

• Fix plotly_click in gl3d scenes to fire on touch devices [#6563],
  with thanks to @NickTominaga for the contribution!
• Fix scatter3d when marker.opacity is set to zero [#6581], with thanks to @dmyronuk for the contribution!
• Fix scattermapbox visibility restyle [#6567]