Add peer dependency support for React 19

[davidkpiano]

This pull request updates the peer dependencies for React in two packages to ensure compatibility with React 19.0.0.

Updates to peer dependencies:

• packages/xstate-react/package.json: Updated the react peer dependency to include version 19.0.0.
• packages/xstate-store/package.json: Updated the react peer dependency to include version 19.0.0.

---

A couple things we'll have to keep in mind for React 19:

• Render count in strict mode may be different (e.g. 5 instead of 6)
• The way we are testing errors will change: https://react.dev/blog/2024/04/25/react-19#error-handling

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: ef57f54bd05758b510ba31571471c17d6d2dacda

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

| Name | Type | | ------------- | ----- | | @xstate/react | Patch | | @xstate/store | Patch |

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