Plotly

Fixed
- Fix loading issue in [orca](https://github.com/plotly/orca) (regression introduced in 2.6.0) [[#6011](https://github.com/plotly/plotly.js/pull/6011)]

Fixed
- Fix to avoid including local stackgl_modules/node_modules in the package (regression introduced in 2.6.0) [[6008](https://github.com/plotly/plotly.js/pull/6008)]

Added
- Add `smith` subplots and the `scattersmith` trace type for displaying Smith charts [[5956](https://github.com/plotly/plotly.js/pull/5956), [#5992](https://github.com/plotly/plotly.js/pull/5992)],
with thanks to Kitware and waxlamp for kicking off this effort.

Changed
- Improve drawing the contour lines in non-linear space e.g. on log axes [[5985](https://github.com/plotly/plotly.js/pull/5985)], with thanks to andrew-matteson for the contribution!
- Bump eslint to v8 release candidate including fixes for `no-new-func` test [[5969](https://github.com/plotly/plotly.js/pull/5969)]

Fixed
- Fix `npm install` problem for `npm v6` users (regression introduced in 2.5.0) [[6004](https://github.com/plotly/plotly.js/pull/6004)]
- Fix unhover event data for gl3d subplots [[5954](https://github.com/plotly/plotly.js/pull/5954)],
with thanks to dwoznicki for the contribution!
- Fix scatter3d opacity restyle bug [[5958](https://github.com/plotly/plotly.js/pull/5958)],
with thanks to dwoznicki for the contribution!
- Skip `"hoverinfo": "none"` trace display for hover modes [[5854](https://github.com/plotly/plotly.js/pull/5854)],
with thanks to Domino987 for the contribution!
- Display prefix and suffix of invisible polar axes in hover [[5964](https://github.com/plotly/plotly.js/pull/5964)]
- Reduce calls to `getBoundingClientRect` in `convertToTspans` [[5976](https://github.com/plotly/plotly.js/pull/5976)]
- Avoid wrapping legend items if already on the first column [[5996](https://github.com/plotly/plotly.js/pull/5996)]
- Fix horizontal alignment of colorbar in editable mode when `xanchor` is set to "center" [[6002](https://github.com/plotly/plotly.js/pull/6002)]
- Fix to improve rendering of graphs with Mathjax on Firefox v82 and higher [[5993](https://github.com/plotly/plotly.js/pull/5993)]

Fixed
- Reduce bundle sizes by updating `surface-nets`, `robust-determinant`, `robust-linear-solve` modules [[5934](https://github.com/plotly/plotly.js/pull/5934), [#5935](https://github.com/plotly/plotly.js/pull/5935), [#5936](https://github.com/plotly/plotly.js/pull/5936)]
- Update CONTRIBUTING guidelines to use `npm v7` and `node.js v16` [[5933](https://github.com/plotly/plotly.js/pull/5933)],
with thanks to sleighsoft for the contribution!

Added
- Include `surface`, `isosurface`, `volume`, `streamtube`, `cone`, `mesh3d`, `scatter3d`, `pointcloud`
and `heatmapgl` in the "strict" bundle by avoid function generation for these traces at runtime [[5888](https://github.com/plotly/plotly.js/pull/5888)]

Changed
- Use `node.js v16` and `npm v7` in development and upgrade the version of `package-lock.json` [[5922](https://github.com/plotly/plotly.js/pull/5922), [#5919](https://github.com/plotly/plotly.js/pull/5919)]

Fixed
- Adjust position of hover in respect to CSS transform [[5916](https://github.com/plotly/plotly.js/pull/5916)]

Fixed
- Fix positioning unified hover box when div has zero height
(regression introduced in 2.3.0) [[5913](https://github.com/plotly/plotly.js/pull/5913)]