The cgi module is marked as deprecated and will be removed in
python3.13. servefile uses the module for its FieldStorage class used in
the upload functionality. For now I will just ignore this, so servefile
doesn't print out the warning each time it is run, but soon this will
require either a rewrite of FieldStorage or an external library.
With this commit we also now officially support python3.10 and
python3.11.