Safari does not support exporting a canvas to blob as image/webp

See https://www.woltlab.com/community/thread/314222/

Author: dtdesign

ts/WoltLabSuite/Core/Image/Resizer.ts

@@ -84,6 +84,11 @@ class ImageResizer {
     const basename = /(.+)(\..+?)$/.exec(fileName);
 
     let blob = await pica.toBlob(data.image, fileType, quality);
+    // Safari does not support image/webp for canvas.toBlob()
+    if (fileType === "image/webp" && blob.type === "image/png") {
+      fileType = "image/jpeg";
+      blob = await pica.toBlob(data.image, fileType, quality);
+    }
 
     if (fileType === "image/jpeg" && typeof data.exif !== "undefined") {
       blob = await ExifUtil.setExifData(blob, data.exif);