Plotly

Added
- Add `sync` tickmode option [[6356](https://github.com/plotly/plotly.js/pull/6356), [#6443](https://github.com/plotly/plotly.js/pull/6443)],
with thanks to filipesantiagoAM and VictorBezak for the contribution!

Changed
- Improve detection of mobile & tablet devices for WebGL rendering by upgrading `is-mobile` [[6432](https://github.com/plotly/plotly.js/pull/6432)]

Fixed
- Fix library's imported name using `requirejs` AMD loader (regression introduced in 2.17.0) [[6440](https://github.com/plotly/plotly.js/pull/6440)]

Fixed
- Fix line redraw (regression introduced in 2.15.0) [[6429](https://github.com/plotly/plotly.js/pull/6429)]

Added
- Add `shift` and `autoshift` to cartesian y axes to help avoid overlapping of multiple axes [[6334](https://github.com/plotly/plotly.js/pull/6334)],
with thanks to [Gamma Technologies](https://www.gtisoft.com) for sponsoring the related development!
- Introduce group attributes for `scatter` trace i.e. `alignmentgroup`, `offsetgroup`, `scattermode` and `scattergap` [[6381](https://github.com/plotly/plotly.js/pull/6381)],
this feature was anonymously sponsored: thank you to our sponsor!
- Add `marker.cornerradius` attribute to `treemap` trace [[6351](https://github.com/plotly/plotly.js/pull/6351)]

Changed
- Change bundler from browserify to webpack [[6355](https://github.com/plotly/plotly.js/pull/6355)]

Fixed
- Fix auto `backoff` when marker symbols and sizes are arrays [[6414](https://github.com/plotly/plotly.js/pull/6414)]
- Avoid displaying resize cursor on static sliders [[6397](https://github.com/plotly/plotly.js/pull/6397)]

Fixed
- Disable slider interactions when `staticPlot` is set to true [[6393](https://github.com/plotly/plotly.js/pull/6393)]

Fixed
- Fix `scattermapbox` redraw (regression introduced in 2.16.0) [[6387](https://github.com/plotly/plotly.js/pull/6387)]

Fixed
- Fix hover on multicategory axes [[6360](https://github.com/plotly/plotly.js/pull/6360)],
with thanks to filipesantiagoAM for the contribution!