Upgrade to libvips 8.10.6-alpha1

- Prebuilt binaries now include mozjpeg and libimagequant (BSD 2-Clause)
- Prebuilt binaries limit AVIF support to the most common 8-bit depth
- Add `mozjpeg` option to `jpeg` method, sets mozjpeg defaults
- Reduce the default PNG `compressionLevel` to the more commonly used 6

package.json

@@ -143,7 +143,7 @@
   },
   "license": "Apache-2.0",
   "config": {
-    "libvips": "8.10.5",
+    "libvips": "8.10.6-alpha1",
     "runtime": "napi",
     "target": 3
   },