• [bugfix] correctly handle clipboard images that aren't 32-bit 4-channel RGBA. this should allow clipboard mode to grab any image format from your clipboard
• [build] dockerize the whole build process to an alpine linux image with custom built packages so I can easily statically link against gtk+2.0 and musl libc on any machine that supports docker
• [refactor] update xurls to new location and interface (fixes compile errors since the latest xurls updates)