Issue #212: Compatibility with psr/http-message 2.0

[omarlopesino]

This adapts the SparkpostResponse class to be compatible with psr http-message 2.0

[phpfui]

Looks like this library has not been updated for 3 years and is now incompatible with some modern dependencies. I would say it has been abandoned by SparkPost. I have seen this before in vendor supported libraries. I had to do a completely new Constant Contact V3 API as Constant Contact stopped supporting API libraries for all languages. Also SparkPost was recently acquired by MessageBird, so I suspect this library (and SparkPost in general) will not be receiving the attention needed to keep it current.

I would be willing to fork and maintain this repo if you want to move your PR to the new fork.

[dunkoh]

@omarlopesino what http client are you using to pass into SparkPost?

[ptwebserv]

Thanks for the merge request, Looks like abandon ware.

[omarlopesino]

I haven't seen the notifications on this issue, sorry. I'll reply in the case there is a chance to update the main library yet.

@omarlopesino what http client are you using to pass into SparkPost?

IIRC I was using guzzle 7 along with guzzle 6 adapter. It was in a Drupal project using sparkpost contrib module: https://git.drupalcode.org/project/sparkpost/-/blob/8.x-2.x/src/ClientService.php?ref_type=heads#L49

[omarlopesino]

There is a fork that have integrated this PR xtremepush#2 and released it, so it looks like the fixes are being applied in other projects too.

[phpfui]

Looks like Xtremepush has not published this package to Composer. I will add a request to do that, as they have done it for another package. If no response, I will clone and publish.