• The edition ID is now included when there is a failure retrieving a
  database.
• The Docker image no longer prints the generated GeoIP.conf when starting
  up. This prevents a possible leak of the account's license key. Pull
  request by Nate Gay. GitHub #109.
• The minimum Go version is now 1.11.
• Failing HTTP requests are now retried using an exponential backoff. The
  period to keep retrying any failed request is set to 5 minutes by default and
  can be adjusted using the new RetryFor configuration option.
• When using the go package rather than the command-line tool, the null value
  for RetryFor will be 0 seconds, which means no retries will be performed. To
  change that, set RetryFor explicitly in the Config you provide, or obtain
  your Config value via geoipupdate.NewConfig.