update freebsd package names

[llua]

% print $OSTYPE;pkg search 'py39-(pygit2|gitpython|dulwich|salt)'
freebsd13.0
py39-dulwich-0.19.16           Python implementation of the Git file formats and protocols
py39-gitpython-3.1.27          Python Git Library
py39-pygit2-1.8.0              Python bindings for libgit2
py39-salt-3004.2               Distributed remote execution and configuration management system

[baby-gnu]

Hello, could you amend your commit to follow the commit message formatting policy?

Do you have any idea why the default-freebsd-130-3004-0-py3 and the default-freebsd-123-3004-0-py3 tests are failing?

[myii]

Do you have any idea why the default-freebsd-130-3004-0-py3 and the default-freebsd-123-3004-0-py3 tests are failing?

@baby-gnu I know what the problem is: the pre-salted Vagrant boxes need to be updated for Python 3.9 (and 3004.2). I hope I can find some time for this soon -- worst case, this PR can be merged without it.

@llua A simple commit message fix would look like this:

-update freebsd package names
+feat(freebsd): update package names for Python 3.9

[sticky-note]

@myii @llua @baby-gnu Looks good for me. Go to merge this now

[saltstack-formulas-travis]

:tada: This PR is included in version 1.12.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: