UPDATE: libavif 0.9.3

Here is an update to libavif 0.9.3.


## [0.9.3] - 2021-10-20

### Added
* Support for progressive AVIFs and operating point selection
* Add automatic tile scaling to the item's ispe or track's dims
* Add diagnostic messages for AV1 decode failures
* avifdec: Add PNG compression level arg
* Make image size limit configurable, expose to avifdec
* Add the AVIF_STRICT_ALPHA_ISPE_REQUIRED flag

### Changed
* Mandate ispe and disallow zero width or height (#640).
* Re-map libavif speed 7-10 to libaom speed 7-9 (#682)
* Refer to https://aomedia-review.googlesource.com/c/aom/+/140624
* If you were using libaom with the following avif speed setting:
* - speed 0-6: no change is needed
* - speed 7: change to speed 6 for the same results
* - speed 8-9: re-test and re-adjust speed according to your app needs
* Update aom.cmd: v3.2.0
* Update dav1d.cmd: 0.9.2
* Pass TestCase's minQuantizer, maxQuantizer, speed to encoder.
* Regenerate tests.json
* Disable JSON-based tests for now, the metrics are inconsistent/unreliable
* Set diagnostic message for aom_codec_set_option()
* Re-map libavif-libaom speed settings (#682)
* Bump of version in CMakeLists.txt was forgotten
* avifdec: Better message for unsupported file extension
* Do not copy input image when encoding with libaom unless width or height is 1
* Fix the comment for AVIF_STRICT_PIXI_REQUIRED
* Update libavif.pc.cmake (#692)
* In 32-bit builds set dav1d's frame_size_limit setting to 8192*8192
* Allocate alpha alongside YUV (if necessary) during y4m decode to avoid incorrect alphaRowBytes math
* Change avif_decode_fuzzer to be more like Chrome
* Update codec_dav1d.c for the new threading model
* Generalized ipco property deduplication
* Rename avifParseMoovBox to avifParseMovieBox for consistency
* Simplify idat storage for avifMeta structure (#756)
* Fix oss-fuzz coverage build failure of dav1d
* Redesign AVIF_DECODER_SOURCE_AUTO to honor the FileTypeBox's major brand
* Use "C420" as default Y4M color space parametee


Index: Makefile
===================================================================
RCS file: /home/cvs/ports/graphics/libavif/Makefile,v
retrieving revision 1.16
diff -u -p -u -p -r1.16 Makefile
--- Makefile 28 Jun 2021 17:15:06 -0000 1.16
+++ Makefile 29 Oct 2021 07:23:01 -0000
@@ -4,10 +4,10 @@ COMMENT= library for encoding and decodi

GH_ACCOUNT= AOMediaCodec
GH_PROJECT= libavif
-GH_TAGNAME= v0.9.2
+GH_TAGNAME= v0.9.3
CATEGORIES= graphics

-SHARED_LIBS= avif 4.1
+SHARED_LIBS= avif 4.2

HOMEPAGE= https://github.com/AOMediaCodec/libavif

Index: distinfo
===================================================================
RCS file: /home/cvs/ports/graphics/libavif/distinfo,v
retrieving revision 1.12
diff -u -p -u -p -r1.12 distinfo
--- distinfo 28 Jun 2021 17:15:06 -0000 1.12
+++ distinfo 29 Oct 2021 07:21:30 -0000
@@ -1,2 +1,2 @@
-SHA256 (libavif-0.9.2.tar.gz) = 1mB9ZUrcQKOS2oPapypP+ALNdQwEWmgTHJMFY5wQ/Fw=
-SIZE (libavif-0.9.2.tar.gz) = 1987058
+SHA256 (libavif-0.9.3.tar.gz) = vNmh9X+YKpYV634vr4cjbciOsdDIhvNHHHRA6tYFBg0=
+SIZE (libavif-0.9.3.tar.gz) = 2000521