Support React 19

[dborysov]

Some packages don't support React 19:

https://github.com/atlassian/pragmatic-drag-and-drop/blob/main/packages/flourish/package.json#L26
https://github.com/atlassian/pragmatic-drag-and-drop/blob/main/packages/react-accessibility/package.json#L31
https://github.com/atlassian/pragmatic-drag-and-drop/blob/main/packages/react-beautiful-dnd-autoscroll/package.json#L31
https://github.com/atlassian/pragmatic-drag-and-drop/blob/main/packages/react-beautiful-dnd-migration/package.json#L31-L32
https://github.com/atlassian/pragmatic-drag-and-drop/blob/main/packages/react-drop-indicator/package.json#L24

[JackLicc]

I'm also experiencing a bug which needs to upgrade to React 19 to address, meanwhile, I'm using atlassian/pragmatic-drag-and-drop which does not support React 19 at the moment. Please give some love!

[dborysov]

Hi guys!

First of all, I wanted to thank you for the library, it's awesome!

Unfortunately, it's blocking us from upgrading React to v19. I understand that upgrading the required version of React sounds scary, but React 19 was released on 5 Dec last year - 2.5 months ago. Could you share some ETA's on this issue to manage the expectations?

Also, it seems that flourish does not use React API at all, so I don't completely understand why you have react listed in the peerDependencies?

And if migrating all might be time-consuming, would it make sense to migrate the mentioned packages one by one?

CC: @michaelabrahamian, @declan-warn (pardon, I have no idea who's the right person to mention here 😅)