[BUG] ALT + TAB Never fires keyup event for ALT so ALT is then treated as being held down.

[Dastari]

Describe the bug
When you Alt+Tab out of the window and back in again, the Alt key is still considered as being held down as the browser never fires the key up event.

To Reproduce
Steps to reproduce the behavior:

1. Go to the Sandbox Below
2. Click on Button to check if Alt is down (Should be No)
3. Alt+Tab out of the Window then back into it
4. Click on Button to check if Alt is down (Should be Yes)

https://codesandbox.io/s/funny-christian-3tqoro?file=/src/App.js

Expected behavior
When browser window returns to focus only keys that are actually held down should act as if they are being held down.

Desktop (please complete the following information):

• OS: Windows 11
• Browser: Edge (Chromium)
• Version: 108.0.1462.54 (Official build) (64-bit)

Additional context
I haven't done a PR yet however I believe the fix is to add an additional handler "window.addEventListener('blur', keyUpHandler) wherever the document.addEventListener('keuUp', keyUpHandler) is called.

[JohannesKlauss]

Thanks for raising that issue. I'll have a look into it

[JohannesKlauss]

Fixed in 4.3.1