add `animatable` key to trace plot-schema
add `animatable` key to trace plot-schema

etpinard/plotly.js,plotly/plotly.js,aburato/plotly.js,plotly/plotly.js,plotly/plotly.js,etpinard/plotly.js,plotly/plotly.js,etpinard/plotly.js,aburato/plotly.js