BREAKING CHANGES: This commit changes upstream repository naming conventions
to get latest binaries and keys. If you depends on versions of salt from older,
please stick with version 1.x.x of this formula

% 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

Modify the `default` suite to use the `saltmajorversion` InSpec input
rather than the `version` variable in `pkgs_spec.rb`.

Use the following command:

```
$ GREP_SED="^\(\s\+master_type: \)true" \
  && grep -rl "${GREP_SED}" test/integration/ \
  | xargs sed -i -e "/${GREP_SED}/s//\1str/"
```

Resolves issues introduced in 24ebbb4e0c.

* CVE-2021-25283 enables Jinja2 safe mode, which breaks use of
  `'dict' in x.__class__.__name__` workaround
* Workaround no longer needed as CentOS 6 is EOL