Update ffmpeg-libfdk_aac to 4.2

ffmpeg/libfdk_aac/PKGBUILD

@@ -9,7 +9,7 @@
 
 _name=ffmpeg
 pkgname=ffmpeg-libfdk_aac
-pkgver=4.1.4
+pkgver=4.2
 pkgrel=1
 epoch=1
 pkgdesc='Complete solution to record, convert and stream audio and video (with libfdk-aac support)'
@@ -30,6 +30,7 @@ depends=(
   libass.so
   libavc1394
   libbluray.so
+  libdav1d.so
   libdrm
   libfreetype.so
   libiec61883
@@ -106,6 +107,7 @@ build() {
     --enable-libaom \
     --enable-libass \
     --enable-libbluray \
+    --enable-libdav1d \
     --enable-libfreetype \
     --enable-libfribidi \
     --enable-libiec61883 \