Allow specifying transition time in sunburst charts

[DaanVanVugt]

The transition time for sunburst charts is fixed at

plotly.js/src/traces/sunburst/plot.js

Line 250 in 1f36292

transitionTime: constants.CLICK_TRANSITION_TIME,

to 750 (from https://github.com/plotly/plotly.js/blob/1f36292b3e824ca4d073b5f9e1746ae5e2608e22/src/traces/sunburst/constants.js) which is quite long, can this become configurable somewhere?