7.3.0
- [Added] Support for Guzzle 8 (#406, thanks @GrahamCampbell)
- [Changed] Raise minimum Guzzle to 7.8.2 and require psr7 ^2.6.3 or ^3.0 and promises ^2.0.3 or ^3.0, dropping support for psr7 v1 and promises v1 (#406)
- [Fixed] Correct typed property syntax for PHP 7.3 compatibility in WebhookTest (#405)