Make point release script compatible with docutils 0.16

    return package

def _get_docutils_parser_settings():

    try:

        return frontend.get_default_settings(Parser)

    except AttributeError:

        # docutils < 0.18. Remove fallback in 23.1

        components = (Parser,)

        return frontend.OptionParser(components=components).get_default_values()

def parse_changelog(package: Package) -> List[ChangelogItem]:

    settings = frontend.get_default_settings(Parser)

    settings = _get_docutils_parser_settings()

    document = utils.new_document(str(package.history_rst), settings)

    Parser().parse(package.history_rst.read_text(), document)

    changelog_items: List[ChangelogItem] = []