Changes since 8.10.1:
- update magicksave/load profile handling [kelilevi]
- better demand hint rules [kaas3000]
- fix tiff thumbnail from buffer and source [vansante]
- in jpegsave, don't set JFIF resolution if we set EXIF resolution
- bump minimum libheif version to 1.3 [lovell]
- dzsave in iiif mode could set info.json dimensions off by one [Linden6]
- pdfload allows dpi and scale to both be set [le0daniel]
- allow gaussblur sigma zero, meaning no blur
- better heif signature detection [lovell]
- fix vips_fractsurf() typo [kleisauke]
- better heif EOF detection [lovell]
- fix gir build with g-o-i 1.66+ [László]
- improve seek behaviour on pipes
- add "speed" param to heifsave [lovell]
- fix regression in C path for dilate / erode [kleisauke]
- fix build with libheif save but no load [estepnv]