Actually move decoding to worker

src/codecs/decoders.ts

@@ -16,8 +16,8 @@ export const decodersPromise: Promise<Decoder[]> = Promise.all(
   [
     browserPNG,
     browserJPEG,
-    browserWebP,
     wasmWebP,
+    browserWebP,
   ]
   .map(async (encoder) => {
     if (await encoder.isSupported()) {

src/codecs/webp/decoder.ts

@@ -1,5 +1,5 @@
 import { blobToArrayBuffer, imageDataToBitmap } from '../../lib/util';
-import DecoderWorker  from './DecoderWorker';
+import DecoderWorker  from './Decoder.worker';
 
 export const name = 'WASM WebP Decoder';
 export const supportedExtensions = ['webp'];