Plotly

Fixed
- Restyling `visible` to `false` on all scatter traces present on a graph
is now working again (bug introduced in 1.17.0) [920]
- Relayouting `paper_bgcolor` now properly propagate to legend
and updatemenu `bgcolor [921]
- Mapbox plot routine no longer make request to public Mapbox server
when linked to a Mapbox Atlas instance [919]

Added
- Add support for animations for scatter trace [802]
- Add frames and animate API -> `Plotly.animate`, `Plotly.addFrames` and
`Plotly.deleteFrames` [802]
- Add `Plotly.update` method which can perform data and layout update in one
call [875]
- Add `pointcloud` gl2d trace type [850, 869]
- Add `xgap` and `ygap` to heatmap traces to define space between heatmap bricks
[868]
- Add `separatethousands` axis attribute which determines whether four-digit
numbers are separated or not [848]
- Add `'skip'` value to trace `hoverinfo` corresponding to traces transparent to
the hover picking routine [851]
- Add support for trace opacity in `toself` filled trace [896]
- Add global transform config option [852]
- Add `requestAnimationFrame` to `dist/`[904]

Changed
- Explicitly skip undefined props on `restyle` and `relayout` [844]
- Removed a few circular dependency patterns [833, 837, 845, 878]

Fixed
- Fix legend trace toggle background attributes on restyle [909]
- Make 'yanchor' default be its intended value of `'top'` [894]
- Fix box plot jitter algorithm when IQR = 0 [915]
- Fix box plot jitter algorithm when data range is 0 [915]
- Fix mapbox event firing duplicates [901]
- Fix mapbox visible false traces handling on first draw [900]
- Avoid draw buffer to display buffer copy in gl2d plots [843]
- Do not extend data array on event emission [842, 866]
- Make `Plotly.redraw` throw an error when called on non plotly graph div [907]
- Make `plotly.min.js` work when injected in Require.js environment [914]

Fixed
- Fix SVG exports for graphs with layout images [846]
- Properly handles duplicate categories in non-default `categoryorder` [863]
- Fix range selector position logic for overlaying axes [873]
- Autorange is now properly computed for heatmapgl and contourgl traces [855,
874]
- Trace toggling via legend preserves axis ranges in gl2d plots [855, 874]
- Bump `mapbox-gl` dependency to 0.22.0 [867]

Fixed
- Fix decoding for the supported HTML entities (bug introduced in 1.16.0) [835]
- Fix layout images position on subplots [831]
- Fix a few cartesian autorange edge cases [813]

Changed
- Drop support for plotting in child windows which broke `Plotly.plot` in
some numerous browsers (e.g. FF46, FF47, FF48) [829]

Added
- Add `updatemenus` (aka dropdowns) layout components [770]
- Trace type `scattermapbox` is now part of the main bundle [816]
- Add support for `plot` in child windows [764, 806]
- Horizontal legends with many items are now wrapped into multiple lines [786]
- Active color of range selector button is now configurable via `activecolor`
[796]
- Add support for mapbox style JSON [795]

Changed
- Promise queue is cleared on `restyle` and `relayout` instead of in
the `plot` catch handler (which ate up user-defined catch handlers as of
1.15.0) [776, 789]
- Improve performance in `convertToSVG` step [791, 804]

Fixed
- Skip over non-container arrays in relink private key step (performance bug
introduced in 1.15.0) [817]
- Categorical heatmap traces with insufficient brick are now functional again
(bug introduced in 1.14.0) [783, 812]
- Fix `Plotly.validate` for info and container array attributes [814, 819]
- Range selector buttons can now be deleted via `relayout` [793]