holoviz/holoviews: Version 1.15.1

This release contains a small number of important bug fixes. Many thanks to all our new contributors @MarcSkovMadsen, @j-svensmark, @ceball, @droumis, @ddrinka, @Jhsmit and @stanwest as well as a special thanks to @Hoxbro for his many bug fixes. An additional thank you goes out to @maximlt, @philippjfr, @jbednar and @jlstevens. Enhancements: Sort output of decimate operation so that it can be used with connected Elements (Curve, Area, etc.) (#5452) Ensure HoloViews is importable from a pyodide webworker (#5410) Add support for stepwise Area plots (#5390) Better error message for hv.Cycle when incompatible backend activated (#5379) Improvements to VSCode notebook support (#5398) Protect matplotlib tests from global styles (#5311) Faster hashing for arrays and pandas objects (#5455) Add pre-commit hooks to CI actions and fixes to pytest configuration (#5385, #5440) Bug Fixes: Allow import of numpy 1.12 (#5367) Fixes handling of iterables in Overlays (#5320) Always return a string when using hv.Dimension.pprint_value (#5383) Support widgets in slices for loc and iloc (#5352) Take account of labeled dimension in Bokeh plotting classes (#5404) Fix handling of pandas Period ranges (#5393) Fixed declaration of Scatter to Selection1DExpr (#5413) Ensure rangesupdate event fires on all plots with linked axes (#5465) Fixed fallback to shapely spatial select (#5468) Many thanks to @Hoxbro for many miscellaneous plotting fixes, including fixes to plotting of BoxWhisker, VectorField elements (#5397, #5450, #5400, #5409, #5460)) Fixes to documentation building GitHub Action (#5320, (#5320)) Documentation: Introduced module documentation (#5362) Remove Python 2 references from README (#5365) Update call to panel add_periodic_callback in Bokeh gallery example (#5436) Added reference to example in RangeToolLink (#5435) API: In future, HoloViews will not allow non-string values for pandas DataFrame column names. This deprecation cycle starts by issuing a DeprecationWarning that should not be visible to users. Issue DeprecationWarning for invalid DataFrame column types (#5457