Added

• Completely rewritten scattergl trace type using regl [#2258]
• Completely rewritten polar chart renderer accompanied by new
  scatterpolar and scatterpolargl trace types [#2200]
• Add the ability to draw layout images and layout shapes on subplot
  with scattergl traces [#2258]
• Add fill capabilities to scattergl traces [#2258]
• Add spikedistance, hoverdistance and skipsnap for more customizable
  spikes and hover behavior on cartesian subplots [#2247]
• Add official Spanish translation (locale es) [#2249]
• Add official French translation (locale fr) [#2252]
• Add locale machinery to annotation new text placeholder [#2257]

Changed

• Old polar trace types (scatter with (r,t) coordinates,
  bar with (r,t) coordinates and area) are now deprecated.

Fixed

• Fix gl2d tick label on pan interaction regression [#2258]
• Fix candlestick hover label regression (bug introduced in v1.32.0) [#2264]
• Fix several gl2d axis related bugs with new regl-based scattergl [#2258]
  See full list under the On-par gl2d milestone https://github.com/plotly/plotly.js/milestone/3
• Fix several polar bugs with scatterpolar [#2200].
  See full list under the On-par polar milestone https://github.com/plotly/plotly.js/milestone/2
• Fix scattergl marker.colorscale handling [#2258]
• Fix ternary relayout calls involving axis tick styles and titles [#2200]
• Fix decimal and thousands settings in de locale [#2246]
• Make scroll handler passive, removing those annoying console warnings [#2251]