Support React 19 as a Peer Dependency

[pkat]

Description

Currently, the package.json for @dwolla/react-drop-ins specifies peer dependencies that are limited to React 18.x:

"peerDependencies": {
  "react": "^18.0.0",
  "react-dom": "^18.0.0"
}

As React 19 has now been released (or is in wide adoption), this restriction prevents users on React 19 from smoothly adopting react-drop-ins. It would be helpful if React 19 support could be added.

Context

I recently tried using @dwolla/react-drop-ins with a project upgrading to React 19 and encountered a peer dependency warning, which can affect installation or bundling. Given that the core functionality appears compatible, relaxing the version range seems like a good move.

Proposed Enhancement

Expand the peer dependency range to include React 19, for example:

"peerDependencies": {
  "react": "^18.0.0 || ^19.0.0",
  "react-dom": "^18.0.0 || ^19.0.0"
}

Benefits

• Aligns with projects that have already upgraded to React 19.
• Improves compatibility and reduces friction for users adopting newer React versions.
• Likely to be a low-impact change if the library doesn’t rely on React-18-only APIs, helping ensure broader adoption. Although if there are any breaking changes or deprecations in React 19 that impact this library, they should be tested and identified.

[ShreyaThapa]

Hi @pkat! We really appreciate you taking the time to report this.

📅 Next Steps: We can prioritize this enhancement in the next month or so. Before making any changes, we want to thoroughly test React 19 compatibility to ensure there are no unexpected issues.

🤝 Contributions Welcome: Thanks for the detailed feedback! We always welcome contributions and issues like this that help us stay current with the React ecosystem.