1.27.0
(feat): Switch from Guzzle to PSR-7/17/18 HTTP interfaces; SDKs are now framework-agnostic
and should work with any PSR-18 compliant HTTP client (Guzzle, Symfony HttpClient, etc.)
The SDK uses php-http/discovery to automatically find an installed PSR-18 client at runtime.
Retry logic is now implemented via a RetryDecoratingClient decorator instead of as Guzzle
middleware. Existing Guzzle users should be unaffected as Guzzle implements PSR-18.
