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)