Log Message:
py-xopen: updated to 1.8.0

v1.8.0 (2023-11-03)

xopen now defers to the isal.igzip_threaded module rather than piping to \ 
external programs in applicable cases. This makes reading and writing to gzip \ 
files using threads more efficient.
Support for Python 3.7 is dropped and support for Python 3.12 is added.