plotly/plotly.js v1.53.0 on GitHub

Introduce rangebreaks on date axes mainly thanks to [#4614] with API revision & improvements in
[#4639, #4641, #4644, #4649, #4652, #4653, #4660, #4661, #4670, #4677, #4684, #4688, #4695, #4696, #4698, #4699]
Introduce "(x|y) unified" hovermode [#4620, #4664, #4669, #4687]
Add "hovered data" mode to spikesnap [#4665]
Add "full-json" export format to Plotly.toImage and Plotly.dowloadImage [#4593]
Add node.customdata and link.customdata to sankey traces [#4621]
Add opacityscale for surface traces [#4480]

Improve contour labels (add extra pad) and correct minus sign [#4540]
Improve sizing text inside pie and sunburst (add extra pad) [#4519]
Improve display of spikelines when spikedistance is set to -1 [#4637]
Improve compare hovermode to include all points at same coordinate [#4664]
Improve histogram hover labels (harmonize start & end values) [#4662]
Display new colors on Plotly's logo [#4691]
Update links & descriptions to Chart Studio Cloud and plotly.com website [#4694]
Update contributing guidelines & add info about trace module architecture [#4624]
Require config.plotlyServerURL to be set for Chart Studio export [#4690]

Fix Plotly.downloadImage to match transparencies in gl3d plots with the on-screen render [#4566]
Fix amount of transparency applied by opacity in surface traces [#4480, #4642]
Fix gaps in bar traces (regression introduced in 1.50.0) [#4634]
Fix gaps in funnel & waterfall [#4663]
Fix template to set axis type, tickformatstops, tick0, dtick, tickvals and tickmode [#4670, #4685]