Update dependency for guzzlehttp/guzzle to ^6.2|^7.0

[cyrillkalita]

Enable support for Guzzle 7.0 #45

[ngunyimacharia]

Is there a way we can help to get this MR merged? All the checks are passing and an approving review has already been granted

[cyrillkalita]

TinyURL test seems to be consistently failing

[axlon]

@cyrillkalita Hey there, first of all thanks for the PR, however I doubt it will be merged, all active members of this organization have left it (including me, and I was the person primarily driving its development). Because I no longer have access to merge or tag this I would recommend you use your fork for now.

Pinging @yak0d3, I think it would be a good idea to transfer ownership of this repository to someone who can devote time to it or mark it as abandoned within packagist