Highcharts-core

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* **ENHANCEMENT:** Align the API to **Highcharts (JS) v.11.4** (163). In particular, this includes:
* Added ``Accessibility.high_contrast_mode`` support.
* Added ``OrganizationOptions.hanging_side`` support.
* Added ``SankeyOptions.node_distance`` support.
* Added ``TreegraphOptions.node_distance`` support.
* Adjusted diagram (``ArcDiagramOptions``, ``TreegraphOptions``, ``DependencyWheelOptions``, and
``SankeyOptions``) ``.node_width`` support and documentation.
* Added ``NodeOptions.height`` support.

* **ENHANCEMENT:** Added ``utility_functions.datetime64_to_datetime()`` function to convert
``numpy.datetime64`` to ``datetime.datetime`` (needed to close 162).

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* **ENHANCEMENT:** Align the API to **Highcharts (JS) v.11.3** (146). In particular, this includes:

* Added ``ChartOptions.axis_layout_runs`` property.
* Added ``ColorAxis.height`` property.
* Added ``ColorAxis.width`` property.
* Added ``Data.column_types`` property.
* Added ``Exporting.fetch_options`` property.
* Implemented support for verbose axis date-time unit labelling configuration (see: ``DateTimeLabelFormats``).


* **BUGFIX:** Added support for ``nodeFormat`` and ``nodeFormatter`` to tooltip properties for
diagram series (Organization, Dependency Wheel, and Sankey). (148)
* **ENHANCEMENT:** Added ability to remove or override the JavaScript event listener when
serializing a chart to a JavaScript literal (131 - courtesy of
`ByronCook <https://github.com/ByronCook>`__ ).
* **ENHANCEMENT:** Added support for the ``HCP_ALLOW_SPECIAL_IPS`` environment variable
which allows localhost (or other special URLs) to pass URL validation. (147)
* **DOCUMENTATION:** Fixed typos in **Getting Started** tutorial. (149)
* **DOCUMENTATION:** Fixed typos in documentation (courtesy of `karlacio <https://github.com/karlacio>`
and `maxduganknight <https://github.com/maxduganknight>`).

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* **BUGFIX:** Fixed bug in JS literal serialization that would misinterpret strings that
start with ``{``, end with ``}``, and contain a colon (``:``) as an object literal rather
than as a string. (130)

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* **ENHANCEMENT:** Align the API to **Highcharts (JS) v.11.2** (127). In particular, this includes:

* Added ``AxisEvents.point_break_out`` property.
* Added ``.node_alignment`` property to ``SankeyOptions`` and ``SankeySeries``.
* Added ``.link_color_mode`` property to ``SankeyOptions`` and ``SankeySeries``.
* Added ``.inactive_other_points`` property to multiple series types.
* Added ``.grouping`` property to Lollipop series type.
* Added ``.low_marker`` property Area Range and Dumbell series types.
* Added ``.show_export_in_progress`` and ``.export_in_progress`` support.
* Added ``.drag`` annotation event support.

* **BUGFIX:** Fixed missing ``.levels`` support in ``TreegraphOptions`` and ``TreegraphSeries``.


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* **BUGFIX:** Fixed edge case error when deserializing ``ChartOptions`` using ``.from_dict()``
with a ``dict`` that had been serialized using ``.to_dict()`` which errored on ``.margin``
and ``.spacing`` (124).

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* **BUGFIX:** Fixed location of the ``histogram.js`` module and ``bellcurve.js`` module to reflect
latest changes in Highcharts (JS).

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