mail/py-mailsuite: Update to 1.9.9

As pyproject.toml support is going to take a while, I think it's better
to update the port somehow then leave it with the way too old version.
Once we as Python FreeBSD resolve how to build PEP-517 ports, I will
change this port accordingly.

ChangeLog:
https://github.com/seanthegeek/mailsuite/blob/master/CHANGELOG.md#199

PR: 265356