While using pdfjs in frameworks with SSR like Next.js or Gatsby there is an error while build phase
```ReferenceError: window is not defined```

The error occurs at line 563 in `ui_utils.js`

Looks like all changes needs is:
```diff
const animationStarted = new Promise(function (resolve) {
  if (
    typeof PDFJSDev !== "undefined" &&
-   PDFJSDev.test("LIB && TESTING") &&
+   PDFJSDev.test("LIB && TESTING") ||
    typeof window === "undefined"
  ) {
    // Prevent "ReferenceError: window is not defined" errors when running the
    // unit-tests in Node.js/Travis.
    setTimeout(resolve, 20);
    return;
  }
  window.requestAnimationFrame(resolve);
});
```

There is an issue in react-pdf: https://github.com/wojtekmaj/react-pdf/issues/657
getVisibleElements,
  isPortraitOrientation,
  isValidRotation,
  isValidScrollMode,
  isValidSpreadMode,
  MAX_AUTO_SCALE,
  MAX_SCALE,
  MIN_SCALE,
  moveToEndOfArray,
  noContextMenuHandler,
  normalizeWheelEventDelta,
  normalizeWheelEventDirection,
  parseQueryString,
  PresentationModeState,
  ProgressBar,
  RendererType,
  roundToDivide,
  SCROLLBAR_PADDING,
  scrollIntoView,
  ScrollMode,
  SidebarView,
  SpreadMode,
  TextLayerMode,
  UNKNOWN_SCALE,
  VERTICAL_PADDING,
  waitOnEventOrTimeout,
  WaitOnType,
  watchScroll,
};