Get a list of version Resources present on a project.

        :param project: ID or key of the project to get versions from
        :type project: str
        :rtype: List[Version]

def project_versions(self, project):
        """Get a list of version Resources present on a project.

        :param project: ID or key of the project to get versions from
        :type project: str
        :rtype: List[Version]
        """
        r_json = self._get_json('project/' + project + '/versions')
        versions = [
            Version(self._options, self._session, raw_ver_json) for raw_ver_json in r_json]
        return versions