- update to 4.15.1:
* further improvements to filtering/grouping including
reporting a filter change in the UI
* fake_pha can be called with a list of ARF/RMF names
* added linewidth option for line and histogram plots
* documentation changes:
* fixed broken URLs
* improved documentation for templates, plot_pvalue
* added documentation testing with doctestplus
* Infrastructure changes:
* dropped support for Python 3.8
* experimental support of Python 3.11
* supported versions of Xspec are 12.12.0 - 12.13.0
* bug fixes:
* various updates to notice/ignore and group/ungroup code
* fixed issue with show_bkg
* fixed issue when binning values into a 1D histogram
* fixed cache errors with the TableModel class