[Feature Request] Add React 19 support

[kai11]

What problem would this feature solve?

I tried to use this module in Nextjs 15 / React 19 project and was able to use it with --force because of react ^18 requirement.
Intercom integration is ok, I dont see any errors.

Describe the solution you’d like to see

Add support for React 19

Are you willing to work on implementing this solution?

Yes

Describe alternatives you’ve considered

Additional context

I don't see test suite in this project.
Will this be enough if I update example Nextjs application to React 19 and test with all messengers?

Code of Conduct

• I agree to follow this project’s Code of Conduct

[benschwarz]

@kai11 Yep, you can use the nextjs app in the ./websiteto build and verify changes 👍