Run Code style check in CI

.github/workflows/test.yaml

@@ -45,3 +45,6 @@ jobs:
 
       - name: Run rector
         run: ./vendor/bin/rector --dry-run
+
+      - name: Run code style check
+        run: ./vendor/bin/ecs

ecs.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+use PhpCsFixer\Fixer\FunctionNotation\VoidReturnFixer;
+use PhpCsFixer\Fixer\Import\NoUnusedImportsFixer;
+use Symplify\EasyCodingStandard\Config\ECSConfig;
+use Symplify\EasyCodingStandard\ValueObject\Set\SetList;
+
+return function (ECSConfig $ecsConfig): void {
+    $ecsConfig->paths([
+        __DIR__ . '/src',
+        __DIR__ . '/tests',
+        __FILE__,
+    ]);
+
+    $ecsConfig->rules([NoUnusedImportsFixer::class, VoidReturnFixer::class]);
+
+    // this way you can add sets - group of rules
+    $ecsConfig->sets([SetList::SPACES, SetList::ARRAY, SetList::DOCBLOCK, SetList::NAMESPACES, SetList::COMMENTS, SetList::PSR_12]);
+};