v2.31.0

Added

• Add zorder attribute to various cartesian traces for controlling stacking order of SVG traces drawn
  into a subplot [#6918, #6953]. This feature was anonymously sponsored: thank you to our sponsor!
• Add "between" option to shape layer for placing them above grid lines and below traces [#6927],
  with thanks to @my-tien for the contribution!
• Add "raw" sizemode to cone trace [#6938]
• Add layout.hoversubplots to enable (x|y) and unified hover effects across multiple cartesian suplots
  sharing one axis [#6947, #6950]

Changed

• Regenerate stackgl_modules/index.js using updated dependencies [#6937]

Fixed

• Fix hover count in parcats trace [#6944], with thanks to @weiweikee for the contribution!