This library hasn't had a release for a few years, so maybe it is no longer maintained?

If it is being maintained, then it is missing IPv6 support.

IPv6 is now reaching over 40% according to Google statistics; https://www.google.com/intl/en/ipv6/statistics.html

Within a few years, IPv4 will be in the minority.

Some network providers have already switched to IPv6-only, e.g. Telstra mobile users in Australia, as well as many providers in India, China, and other regions. https://www.sidn.nl/en/news-and-blogs/australias-telstra-switches-mobile-users-to-ipv6-only