This updates the following polyfill libraries:
- `formdata-polyfill` from `3.0.13` to `3.0.20`.
- `objectFitPolyfill` from `2.3.4` to `2.3.5`.
- `polyfill-library` from `3.42.0` to `3.104.0`.
Props gziolo, desrosj.
Fixes#52854.
Built from https://develop.svn.wordpress.org/trunk@50615
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Pending block editor revisions for WordPress 5.4 will make use of `window.URL` and `window.DOMRect`. These are not available in Internet Explorer (or pre-Chromium Edge for `DOMRect`) and must be polyfilled to avoid script errors.
The changes make use of the existing polyfill pattern, and existing `polyfill-library` dependency. The dependency is bumped to the latest version, since the previous version did not include the `DOMRect` polyfill.
Props jorgefilipecosta.
Fixes#49360.
Built from https://develop.svn.wordpress.org/trunk@47238
git-svn-id: http://core.svn.wordpress.org/trunk@47038 1a063a9b-81f0-0310-95a4-ce76da25c4cd