docs: def find_version(
          package_name: str, version_module_name: str = '_version',
          version_variable_name: str = 'VERSION') -> str:
      """Simulate behaviour of "from package_name._version import VERSION", and return VERSION."""
      version_module = importlib.import_module(
          '{}.{}'.format(package_name.replace('-', '_'), version_module_name))
      return getattr(version_module, version_variable_name)