ioam/holoviews: Version 1.10.0

JupyterLab support: Full compatibility with JupyterLab when installing the jupyterlab_holoviews extension (#687) New components: Added Sankey element to plot directed flow graphs (#1123) Added TriMesh element and datashading operation to plot small and large irregular meshes (#2143) Added a Chord element to draw flow graphs between different nodes (#2137, #2143) Added HexTiles element to plot data binned into a hexagonal grid (#1141) Added Labels element to plot a large number of text labels at once (as data rather than as annotations) (#1837) Added Div element to add arbitrary HTML elements to a Bokeh layout (#2221) Added PointDraw, PolyDraw, BoxEdit, and PolyEdit streams to allow drawing, editing, and annotating glyphs on a Bokeh plot, and syncing the resulting data to Python (#2268) Features: Added radial HeatMap option to allow plotting heatmaps with a cyclic x-axis (#2139) All elements now support declaring bin edges as well as centers allowing Histogram and QuadMesh to become first class Dataset types (#547) When using widgets, their initial or default value can now be set via the Dimension.default parameter (#704) n-dimensional Dask arrays are now supported directly via the gridded dictionary data interface (#2305) Enhancements: Improvements to exceptions (#1127) Toolbar position and merging (via a new merge_toolbar option) can now be controlled for Layout and Grid plots (#1977) Bokeh themes can now be applied at the renderer level (#1861) Dataframe and Series index can now be referenced by name when constructing an element (#2000) Option-setting methods such as .opts, .options and hv.opts now allow specifying the backend instead of defaulting to the current backend (#1801) Handled API changes in streamz 0.3.0 in Buffer stream (#2409) Supported GIF output on windows using new Matplotlib pillow animation support (#385) Provided simplified interface to rasterize most element types using datashader (#2465) Bivariate element now support levels as a plot option (#2099) NdLayout and GridSpace now consistently support * overlay operation (#2075) The Bokeh backend no longer has a hard dependency on Matplotlib (#829) DynamicMap may now return (Nd)Overlay with varying number of elements (#1388) In the notebook, deleting or re-executing a cell will now delete the plot and clean up any attached streams (#2141) Added color_levels plot option to set discrete number of levels during colormapping (#2483) Fixes: Layout and Overlay objects no longer create lower-case nodes on attribute access (#2331) Dimension.step now correctly respects both integer and float steps (#1707) Fixed timezone issues when using linked streams on datetime axes (#2459) Changes affecting backwards compatibility: Image elements now expect and validate regular sampling (#1869); for genuinely irregularly sampled data QuadMesh should be used. Tabular elements will no longer default to use ArrayInterface, instead preferring pandas and dictionary data formats (#1236) Cycle/Palette values are no longer zipped together; instead they now cycle independently (#2333) The default color Cycle was expanded to provide more unique colors (#2483) Categorical colormapping was made consistent across backends, changing the behavior of categorical Matplotlib colormaps (#2483) Disabled auto-indexable property of the Dataset baseclass, i.e. if a single column is supplied no integer index column is added automatically (#2522