Fixed PHPStan level 8 issues

Author: gplanchat

README.md

@@ -0,0 +1,14 @@
+Pipeline Contracts
+===
+
+This package aims at providing contracts for an Extract-Load-Pattern,
+with logging, line rejections and execution states.
+
+
+[![Quality](https://github.com/php-etl/pipeline-contracts/actions/workflows/quality.yaml/badge.svg)](https://github.com/php-etl/pipeline-contracts/actions/workflows/quality.yaml)
+[![PHPStan level 5](https://github.com/php-etl/pipeline-contracts/actions/workflows/phpstan-5.yaml/badge.svg)](https://github.com/php-etl/pipeline-contracts/actions/workflows/phpstan-5.yaml)
+[![PHPStan level 7](https://github.com/php-etl/pipeline-contracts/actions/workflows/phpstan-7.yaml/badge.svg)](https://github.com/php-etl/pipeline-contracts/actions/workflows/phpstan-7.yaml)
+[![PHPStan level 8](https://github.com/php-etl/pipeline-contracts/actions/workflows/phpstan-8.yaml/badge.svg)](https://github.com/php-etl/pipeline-contracts/actions/workflows/phpstan-8.yaml)
+[![Mutations](https://github.com/php-etl/pipeline-contracts/actions/workflows/infection.yaml/badge.svg)](https://github.com/php-etl/pipeline-contracts/actions/workflows/infection.yaml)
+![PHP](https://img.shields.io/packagist/php-v/php-etl/pipeline-contracts)
+

src/NullRejection.php

@@ -9,6 +9,7 @@ public function initialize(): void
         // NOOP
     }
 
+    /** @param non-empty-array<mixed>|object $rejection */
     public function reject(object|array $rejection, ?\Throwable $exception = null): void
     {
         // NOOP

src/RejectionInterface.php

@@ -5,6 +5,7 @@
 interface RejectionInterface
 {
     public function initialize(): void;
+    /** @param non-empty-array<mixed>|object $rejection */
     public function reject(object|array $rejection, ?\Throwable $exception = null): void;
     public function teardown(): void;
 }