message: fix(readImageArrayBuffer): Return webworker promise
diff: @@ -7,7 +7,7 @@ const readImageArrayBuffer = (webWorker, arrayBuffer, fileName, mimeType) => {
  return createWebworkerPromise('ImageIO', worker)
  .then(({ webworkerPromise, worker: usedWorker }) => {
  worker = usedWorker
  - webworkerPromise.postMessage(
  + return webworkerPromise.postMessage(
  {
  operation: 'readImage',
  name: fileName,
  