[BUG] Not working with iOS versions below v13.4

[arnaskro]

Describe the bug
React-virtuso does not seem to work in iOS versions >= 13.3. And there are no errors in console.
But it works with versions above v13.4.

Reproduction
https://1xdrf.csb.app/
https://codesandbox.io/s/agitated-williams-1xdrf?file=/src/App.js
https://virtuoso.dev/

To Reproduce
Steps to reproduce the behavior:

1. Get a device with iOS >= v13.3
2. Open the sandbox link or the official website
3. See that the list is not rendered and there are no errors.

Expected behavior
Would be nice if it works with v10 and above.

Screenshots

Device	iOS	Screenshot	Status
iPhone 11 Pro Max	v13.3	Screenshot	❌
iPhone 8	v11.4	Screenshot	❌
iPhone 11 Pro Max	v13.3	Screenshot	❌
iPhone 8	v13.3	Screenshot	❌
iPhone 13 Pro	v15	Screenshot	✅ just an example that it works with other versions

Desktop (please complete the following information):

• iPhone 8/XS/11/11 Pro Max - iOS 13.3 - Safari/Chrome
• iPhone 7 - iOS 10/12 - Safari/Chrome
• iOS >= v13.3

[petyosi]

You need to polyfill the ResizeObserver: https://caniuse.com/resizeobserver.

[iplus26]

You need to polyfill the ResizeObserver: https://caniuse.com/resizeobserver.

You should list this dependency in Browser Support section. It doesn't even throw an error..