The stable branch hasn't seen any commits since 2017. The last head of the -next branch is from last summer, I think, and the last time I've seen a patch on the mailing list was about three weeks ago.
I'm certain it is still maintained because i occasionally see patches coming in in the development list and in 2018 i submitted a bugfix for icon persistence and a new feature to force client side decorations on windows: https://i.imgur.com/xcVSNaN.jpg
Though i don't know why exactly there hasn't been a new release. The current maintainer is active (he does the merges) and there have been a bunch of features and fixes, so i'm not sure what is going on.
