Replace GuzzleHttp with PSR-18 HTTP Clients

[flavioheleno]

This pull request replaces the Guzzle HTTP Client with PSR 17 and 18 interfaces. Closes #1019.

Changes to Dependencies:

• The dependencies psr/http-client, psr/http-factory, and psr/http-message were added to the require section.
• The guzzlehttp/guzzle package was moved to the require-dev section.

Changes to the AbstractProvider Class:

• Guzzle's HttpClientInterface was replaced with ClientInterface from the PSR-18 standard.
• Guzzle's RequestFactory was replaced with RequestFactoryInterface and StreamFactoryInterface from the PSR-17 standard.

Removal of the RequestFactory Class:

• The entire RequestFactory class was removed as it's no longer needed with the introduction of the PSR-17 standard interfaces.

[verfriemelt-dot-org]

what needs to happen to move forward with this? :)

[verfriemelt-dot-org]

i tested this with my application and can confirm that everything is working as expected so far for me 👍

[ramsey]

I'll review this while I'm on holiday, coming up in a couple of weeks, and will merge it then. It might require a new major version, which I'm happy to tag for this.

We have an interesting history with these kinds of requests, and I bet @shadowhand would agree with me that we are way overdue to accept this. 😁

I'm going to tag a bunch of issues and PRs from over the years here, just to connect things together:

• Introducing HTTPlug #475
• Implement HTTPlug #538
• Allow another HTTP client #652
• Support using different HTTP Clients through PSR-17 and PSR-18 #685
• Set custom User-Agent for requests #698
• make option "verify" also without parameter proxy available #704
• Send additional options to Guzzle #863
• feat: PSR18 #885

[ramsey]

Don't worry about the test failures on PHP 7.1 and earlier. If I tag this for a new major version, I'll be dropping support for everything before PHP 8.1.

[flavioheleno]

I'll fix the unit tests errors running on 8.1+

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (3.x@c8cc03e). Learn more about missing BASE report.

Additional details and impacted files

@@          Coverage Diff           @@
##             3.x    #1032   +/-   ##
======================================
  Coverage       ?   99.03%           
  Complexity     ?      195           
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  Files          ?       19           
  Lines          ?      517           
  Branches       ?        0           
======================================
  Hits           ?      512           
  Misses         ?        5           
  Partials       ?        0           

Files with missing lines	Coverage Δ
src/Provider/AbstractProvider.php	98.03% <100.00%> (ø)

[ramsey]

@flavioheleno FYI, I've created a 3.x branch that targets PHP 8.1+, and I've repointed the based of this branch to 3.x and resolved the conflicts in composer.json.