add more transition types

On the heels of #1849 being closed (via https://github.com/plotly/plotly.js/pull/3217), here's a list of new transition types/tweens that we'll want to add, probably piece by piece, trace by trace:

• mark position tweening for all scatter types, and for bars (i.e. ranked bars that change rank)
  • bar position tweens done in #4180 and #4186
• size tweening for everything that has a size: marker size for all scatter traces, height of bar/barpolar, box and violin parameters, text elements
  • bar height tweens done in #4180
• color tweening for everything that has a color: bars, choropleths, boxes, whatever
  • bar color tweens done in #4180
• range tweening for everything that has a range

• bar text color and font-size tweening https://github.com/plotly/plotly.js/pull/4186#issuecomment-533699952

Commencez par examiner le travail de transition référencé dans #1849, #4180 et #4186, y compris le commentaire restant concernant la couleur du texte et la taille de police de la barre. Utilisez la checklist de cette issue pour déterminer quelles zones de tweening de position, de taille, de couleur et de plage restent à traiter ; terminé signifie que les types de trace listés applicables prennent en charge ces transitions.