ioam/holoviews: Version 1.10.8

This a likely the last hotfix release in the 1.10.x series containing fixes for compatibility with bokeh 1.0 and matplotlib 3.0. It also contains a wide array of fixes contributed and reported by users: Special thanks for the contributions by Andrew Huang (@ahuang11), Julia Signell (@jsignell), and Zachary Barry (@zbarry). Enhancements: Add support for labels, choord, hextiles and area in .to interface (#2924) Allow defining default bokeh themes as strings on Renderer (#2972) Allow specifying fontsize for categorical axis ticks in bokeh (#3047) Allow hiding toolbar without disabling tools (#3074) Allow specifying explicit colormapping on non-categorical data (#3071) Support for displaying xarray without explicit coordinates (#2968) Fixes: Ensured that objects are garbage collected when using linked streams (#2111) Allow dictionary data to reference values which are not dimensions (#2855, #2859) Fixes for zero and non-finite ranges in datashader operation (#2860, #2863, #2869) Fixes for CDSStream and drawing tools on bokeh server (#2915) Fixed issues with nans, datetimes and streaming on Area and Spread elements (#2951, c55b044) General fixes for datetime handling (#3005, #3045, #3075) Fixed handling of curvilinear and datetime coordinates on QuadMesh (#3017, #3081) Fixed issue when inverting a shared axis in bokeh (#3083) Fixed formatting of values in HoloMap widgets (#2954) Fixed setting fontsize for z-axis label (#2967) Compatibility: Suppress warnings about rcParams in matplotlib 3.0 (#3013, #3058, #3104) Fixed incompatibility with Python <=3.5 (#3073) Fixed incompatibility with bokeh >=1.0 (#3051) Documentation: Completely overhauled the FAQ (#2928, #2941, #2959, #3025