This release contains the merged pull requests and bug fixes which have happened the last commit. It makes swaylock-effects work on Sway 1.8, supports more pixel formats for screenshots, merges in various bug fixes from upstream, fixes some issues which would cause the code to not compile on certain systems, etc.
Refer to this page for a list of commits since 1.6-3: v1.6-3...mortie:swaylock-effects:v1.6-4