Plotly

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)]

Fixed
- The required shapefiles to generate the choropleths via `plotly.figure_factory.create_choropleth` are now shipped in the package data.

Added
- County Choropleth figure factory. Call `help(plotly.figure_factory.create_choropleth)` for examples and how to get started making choropleths of US counties with the Python API.

Note: Calling `plotly.figure_factory.create_choropleth` will fail with an IOError due to missing shapefiles see: https://github.com/plotly/plotly.py/blob/master/CHANGELOG.md#241---2018-02-21

Fixed
- Fix period positioned hover to work in different time zones as well as on grouped bars [[5864](https://github.com/plotly/plotly.js/pull/5864)]
- Use ids from axes when making hover data keys [[5852](https://github.com/plotly/plotly.js/pull/5852)]
- Do not include regl based traces `parcoords`, `splom`, `scattergl` and `scatterpolargl` in the "strict" bundle so that it could be used with CSP without WebGL warning [[5865](https://github.com/plotly/plotly.js/pull/5865)]

Fixed
- Merged [pull request](https://github.com/plotly/plotly.py/commit/a226e07393c158e01c34c050aaf492da9d77679a) that fixes `GraphWidget` for IPython > v6
Updated
- Updated `plotly.min.js` to version 1.33.1.
- New plot types include a `violin` trace type.
- New features include completely rewritten `scattergl` using `regl` and a completely rewritten polar chart renderer.
- See [the plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#1331----2018-01-24) for additional information regarding the updates.

Added
-`column_width` and `row_width` parameters for `plotly.tools.make_subplots`. Call `help(plotly.tools.make_subplots)` for documentation.
Updated
- Updated `plotly.min.js` to version 1.31.2.
- Fixes include adjustments to `table` trace for offline plotting.
- See [the plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#1312----2017-10-23) for additional information regarding the updates.