Additional AVIF options (#987)

* Separate colour & alpha options for AVIF

* Adding broken noise synthesis

* Build files

* Updating build

* Changing speed default

* Remove old comment

* Better speed default

src/features/encoders/avif/shared/meta.ts

@@ -19,10 +19,11 @@ export const mimeType = 'image/avif';
 export const extension = 'avif';
 export const defaultOptions: EncodeOptions = {
   cqLevel: 33,
-  minQuantizerAlpha: 0,
+  cqAlphaLevel: -1,
+  denoiseLevel: 0,
   tileColsLog2: 0,
   tileRowsLog2: 0,
-  speed: 8,
+  speed: 6,
   subsample: 1,
   chromaDeltaQ: false,
   sharpness: 0,