Unofficial
No official up to date support though.
It is a matter of perspective. You have the latest update that was lineage-14.1-20190217-nightly-i9300-signed.zip. The LineageOS 14.1 Source Code continues to be updated but does not make new compilations of the code. There you have to resort to the official forum where the community performs this compilation (lineage-14.1-20190615-UNOFFICIAL-i9300.zip) or the experimental (lineage-14.1-20190709-experimental-i9300 .zip) every time there is a security update (Security String)