[Request] Update psr/http-message to v2

[eblanshey]

This package is using the older v1 for psr/http-message. Other composer packages using the newer version cannot be installed simultaneously as a result. It would be appreciated to switch to the newer version.

Thank you.

[LanaJ11]

@eblanshey Thank you for raising this issue!
The package has now been updated to support both v1 and v2. Please update to the latest release and let us know if you encounter any further issues.