pwkit 1.1.0

pwkit 1.1.0 (2023-06-18)

A test release, after many years of inactivity, because the previous release
won't even import noawadays due to the use of very old Numpy features that have
been removed.

• Switch to Cranko CI and release automation
• Smattering of modernizations
• Replace deprecated np.{int,float,complex,bool} with corresponding built-in types
• Remove uses of np.asscalar(), which has been removed in latest Numpys
• pwkit/inifile.py: untested hacks to get it working on Python 3
• pwkit/astutil.py: fix up sastrom
• pwkit/colormaps.py: update to use Gtk 3