code: def add_issue_type(self, name, **attrs):
          
          return IssueTypes(self.requester).create(self.id, name, **attrs)
docs: Add a Issue type to the project and returns a
          :class:`IssueType` object.
  
          :param name: name of the :class:`IssueType`
          :param attrs: optional attributes for :class:`IssueType`