fix(face-landmarks) fix createImageBitMap polyfill on Safari 14

The polyfill returns an Image object instead of an ImageBitmap. The
latter has a close method, however, which we call.

Make sure we provide a dummy close method to avoid errors.

react/features/face-landmarks/createImageBitmap.js

@@ -1,5 +1,5 @@
 /*
-* Safari polyfill for createImageBitmap
+* Safari < 15 polyfill for createImageBitmap
 * https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/createImageBitmap
 *
 * Support source image types: Canvas.
@@ -16,6 +16,9 @@ if (!('createImageBitmap' in window)) {
             }
             const img = document.createElement('img');
 
+            // eslint-disable-next-line no-empty-function
+            img.close = () => {};
+
             img.addEventListener('load', () => {
                 resolve(img);
             });