Some of your other packages, such as https://github.com/KnpLabs/php-github-api, don't explicitly require guzzle - but instead rely on php-http/discovery to find an appropriate PSR7 compliant library.

It would be great if this library was similarly flexible. If you're open to it, I'd be happy to implement that change here.

Note

Possible duplicate of #49 but there's so little information in that issue I couldn't tell.