Updated libavif to 0.9.0 (#1)

Co-authored-by: Andrew Murray <radarhere@users.noreply.github.com>

Author: radarhere

depends/install_libavif.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -eo pipefail
 
-LIBAVIF_VERSION=0.8.4
+LIBAVIF_VERSION=0.9.0
 
 if uname -s | grep -q Darwin; then
     PREFIX=/usr/local

winbuild/build_prepare.py

@@ -304,9 +304,9 @@ def cmd_msbuild(
         "bins": [r"*.dll"],
     },
     "libavif": {
-        "url": "https://github.com/AOMediaCodec/libavif/archive/v0.8.4.zip",
-        "filename": "libavif-0.8.4.zip",
-        "dir": "libavif-0.8.4",
+        "url": "https://github.com/AOMediaCodec/libavif/archive/v0.9.0.zip",
+        "filename": "libavif-0.9.0.zip",
+        "dir": "libavif-0.9.0",
         "build": [
             cmd_cd("ext"),
             cmd_rmdir("aom"),