Fixed php81 compatibility issue Issue (Deprecated: Return type of WF\Hypernova\Job::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /wayfair/data/www/composer-packages/wayfair/hypernova-php/src/Job.php on line 44)
Fixed some return type issues in Unit test cases
Bumped PHPUnit Version
Added github workflow to run pipeline in. 7.4 and 8.1
https://github.com/pardeep26k/hypernova-php/actions/runs/2760379630