Changes since 8.15.2:

• fix dzsave of >8-bit images to JPEG
• jpegsave: fix chrominance subsampling mode with jpegli [kleisauke]
• pngload: disable ADLER32/CRC checking in non-fail mode [kleisauke]
• improve target_clones support check [kleisauke]
• fix pipe read limit
• fix a rare crash on Windows in highly threaded applications [Julianiolo]
• vipssave: fix infinite loop on Windows with large images [pdbourke]
• conva: fix a crash with {u,}{short,int} images [erdmann]
• fix vips_image_get_string
• heifsave: fix lossless mode [kleisauke]
• composite: fix dest-atop blend mode [kleisauke]
• fix vips_source_map for zero-length sources [kleisauke]

Windows binaries here https://github.com/libvips/build-win64-mxe/releases/tag/v8.15.3