This release has a user requested enhancement and another user contributed enhancement. Both of these are doc'ed in the Advanced Topics section of the saspy doc (https://sassoftware.github.io/saspy/advanced-topics.html#).
The first is an enhancement to support the Python logging facility, instead of saspy using print() to write messages to the output. This is a great feature and provides a lot of way to configure it yo your needs; from setting what level of messages to get, and to specifying whether the show up in the output or in a file if you like. You can even provide formatting, like timestamps prepended to the messages or whatever you want.
The other is a contribution (#401) which allows the SASsession object to be used as a Context Manager, like in the 'with' statement. This automatically ends the session once the 'with' block of code has completed. Very convenient.
Another thing is for getting the Script directory (containing the user contributed script which was added in V3.7.3) actually installed with SASPy. I forget to add that directory to the selection criteria for what get's deployed when you pip install. My bad on that one. But, now the run_sas.py script will be available in the saspy deployment when you install it.
Other than that there were some doc updates and changes and a couple other tweaks, but the above are the main things added to this release.