intl.formatList return type is React.ReactNode instead of string

[andrew--r]

Expected behavior

Return type of intl.formatList is string, like intl.formatMessage.

Current behavior

Return type of intl.formatList is React.ReactNode. It makes impossible to use intl.formatList inside intl.formatMessage, for example:

intl.formatMessage(fileTypeErrorMessage, {
  fileTypes: intl.formatList(['txt', 'md'], {type: 'union'})
});

Your Environment

react-intl@3.9.1